diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/CreateUpdateProductCategoryDto.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/CreateUpdateProductCategoryDto.cs
deleted file mode 100644
index 2f076e9f..00000000
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/CreateUpdateProductCategoryDto.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-using System;
-using System.ComponentModel;
-using System.ComponentModel.DataAnnotations;
-
-namespace EasyAbp.EShop.Products.ProductCategories.Dtos
-{
-    public class CreateUpdateProductCategoryDto
-    {
-        [Required]
-        [DisplayName("ProductCategoryCategoryId")]
-        public Guid CategoryId { get; set; }
-
-        [Required]
-        [DisplayName("ProductCategoryProductId")]
-        public Guid ProductId { get; set; }
-
-        [DisplayName("ProductCategoryDisplayOrder")]
-        public int DisplayOrder { get; set; }
-    }
-}
\ No newline at end of file
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/GetProductCategoryListDto.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/GetProductCategoryListDto.cs
new file mode 100644
index 00000000..3cae3ecd
--- /dev/null
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/Dtos/GetProductCategoryListDto.cs
@@ -0,0 +1,12 @@
+using System;
+using Volo.Abp.Application.Dtos;
+
+namespace EasyAbp.EShop.Products.ProductCategories.Dtos
+{
+    public class GetProductCategoryListDto : PagedAndSortedResultRequestDto
+    {
+        public Guid? CategoryId { get; set; }
+        
+        public Guid? ProductId { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/IProductCategoryAppService.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/IProductCategoryAppService.cs
index feb53235..86d0767d 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/IProductCategoryAppService.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/ProductCategories/IProductCategoryAppService.cs
@@ -9,9 +9,9 @@ namespace EasyAbp.EShop.Products.ProductCategories
         ICrudAppService< 
             ProductCategoryDto, 
             Guid, 
-            PagedAndSortedResultRequestDto,
-            CreateUpdateProductCategoryDto,
-            CreateUpdateProductCategoryDto>
+            GetProductCategoryListDto,
+            object,
+            object>
     {
 
     }
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductDto.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductDto.cs
index 3a0289c3..8a4129bb 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductDto.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application.Contracts/EasyAbp/EShop/Products/Products/Dtos/ProductDto.cs
@@ -11,8 +11,6 @@ namespace EasyAbp.EShop.Products.Products.Dtos
 
         public Guid ProductDetailId { get; set; }
 
-        public ICollection<Guid> CategoryIds { get; set; }
-
         public string Code { get; set; }
         
         public string DisplayName { get; set; }
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductCategories/ProductCategoryAppService.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductCategories/ProductCategoryAppService.cs
index bb70df4b..15de0d49 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductCategories/ProductCategoryAppService.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductCategories/ProductCategoryAppService.cs
@@ -1,18 +1,17 @@
 using System;
+using System.Linq;
+using System.Threading.Tasks;
 using EasyAbp.EShop.Products.Authorization;
 using EasyAbp.EShop.Products.ProductCategories.Dtos;
+using Volo.Abp;
 using Volo.Abp.Application.Dtos;
 using Volo.Abp.Application.Services;
 
 namespace EasyAbp.EShop.Products.ProductCategories
 {
-    public class ProductCategoryAppService : CrudAppService<ProductCategory, ProductCategoryDto, Guid, PagedAndSortedResultRequestDto, CreateUpdateProductCategoryDto, CreateUpdateProductCategoryDto>,
+    public class ProductCategoryAppService : CrudAppService<ProductCategory, ProductCategoryDto, Guid, GetProductCategoryListDto, object, object>,
         IProductCategoryAppService
     {
-        protected override string CreatePolicyName { get; set; } = ProductsPermissions.Products.Create;
-        protected override string DeletePolicyName { get; set; } = ProductsPermissions.Products.Delete;
-        protected override string UpdatePolicyName { get; set; } = ProductsPermissions.Products.Update;
-        protected override string GetPolicyName { get; set; } = ProductsPermissions.Products.Default;
         protected override string GetListPolicyName { get; set; } = ProductsPermissions.Products.Default;
         
         private readonly IProductCategoryRepository _repository;
@@ -21,5 +20,46 @@ namespace EasyAbp.EShop.Products.ProductCategories
         {
             _repository = repository;
         }
+
+        protected override IQueryable<ProductCategory> CreateFilteredQuery(GetProductCategoryListDto input)
+        {
+            var queryable = Repository.AsQueryable();
+            
+            if (input.CategoryId.HasValue)
+            {
+                queryable = queryable.Where(x => x.CategoryId == input.CategoryId);
+            }
+
+            if (input.ProductId.HasValue)
+            {
+                queryable = queryable.Where(x => x.ProductId == input.ProductId);
+            }
+
+            return queryable;
+        }
+
+        [RemoteService(false)]
+        public override Task<ProductCategoryDto> GetAsync(Guid id)
+        {
+            throw new NotSupportedException();
+        }
+
+        [RemoteService(false)]
+        public override Task<ProductCategoryDto> CreateAsync(object input)
+        {
+            throw new NotSupportedException();
+        }
+
+        [RemoteService(false)]
+        public override Task<ProductCategoryDto> UpdateAsync(Guid id, object input)
+        {
+            throw new NotSupportedException();
+        }
+
+        [RemoteService(false)]
+        public override Task DeleteAsync(Guid id)
+        {
+            throw new NotSupportedException();
+        }
     }
 }
\ No newline at end of file
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/Products/ProductAppService.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/Products/ProductAppService.cs
index 47c77678..d08179b6 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/Products/ProductAppService.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/Products/ProductAppService.cs
@@ -59,6 +59,13 @@ namespace EasyAbp.EShop.Products.Products
             return input.ShowHidden ? query : query.Where(x => !x.IsHidden);
         }
 
+        protected override Product MapToEntity(CreateUpdateProductDto createInput)
+        {
+            var product = base.MapToEntity(createInput);
+
+            return product;
+        }
+
         public override async Task<ProductDto> CreateAsync(CreateUpdateProductDto input)
         {
             await CheckCreatePolicyAsync();
@@ -203,9 +210,6 @@ namespace EasyAbp.EShop.Products.Products
             await LoadRealInventoriesAsync(product, dto, storeId);
             await LoadPricesAsync(product, dto, storeId);
             
-            dto.CategoryIds = (await _productCategoryRepository.GetListByProductIdAsync(dto.Id))
-                .Select(x => x.CategoryId).ToList();
-            
             return dto;
         }
         
@@ -224,9 +228,6 @@ namespace EasyAbp.EShop.Products.Products
             
             await LoadRealInventoriesAsync(product, dto, storeId);
             
-            dto.CategoryIds = (await _productCategoryRepository.GetListByProductIdAsync(dto.Id))
-                .Select(x => x.CategoryId).ToList();
-            
             return dto;
         }
 
@@ -292,8 +293,11 @@ namespace EasyAbp.EShop.Products.Products
                     product.ProductSkus.Single(sku => sku.Id == productSkuDto.Id), storeId);
             }
 
-            productDto.MinimumPrice = productDto.ProductSkus.Select(sku => sku.Price).Min();
-            productDto.MaximumPrice = productDto.ProductSkus.Select(sku => sku.Price).Max();
+            if (productDto.ProductSkus.Count > 0)
+            {
+                productDto.MinimumPrice = productDto.ProductSkus.Min(sku => sku.Price);
+                productDto.MaximumPrice = productDto.ProductSkus.Max(sku => sku.Price);
+            }
 
             return productDto;
         }
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductsApplicationAutoMapperProfile.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductsApplicationAutoMapperProfile.cs
index 4775b03c..83325cd2 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductsApplicationAutoMapperProfile.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Application/EasyAbp/EShop/Products/ProductsApplicationAutoMapperProfile.cs
@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using EasyAbp.EShop.Products.Products;
 using EasyAbp.EShop.Products.Products.Dtos;
 using EasyAbp.EShop.Products.Categories;
@@ -25,7 +27,6 @@ namespace EasyAbp.EShop.Products
              * Alternatively, you can split your mapping configurations
              * into multiple profile classes for a better organization. */
             CreateMap<Product, ProductDto>()
-                .Ignore(dto => dto.CategoryIds)
                 .Ignore(dto => dto.MinimumPrice)
                 .Ignore(dto => dto.MaximumPrice);
             CreateMap<ProductDetail, ProductDetailDto>();
@@ -38,7 +39,8 @@ namespace EasyAbp.EShop.Products
                 .ForSourceMember(dto => dto.StoreId, opt => opt.DoNotValidate())
                 .ForSourceMember(dto => dto.CategoryIds, opt => opt.DoNotValidate())
                 .Ignore(p => p.ProductAttributes)
-                .Ignore(p => p.ProductSkus);
+                .Ignore(p => p.ProductSkus)
+                .AfterMap((src, dest) => dest.InitializeNullCollections());
             CreateMap<CreateUpdateProductDetailDto, ProductDetail>(MemberList.Source)
                 .ForSourceMember(dto => dto.StoreId, opt => opt.DoNotValidate());
             CreateMap<CreateUpdateProductAttributeDto, ProductAttribute>(MemberList.Source);
@@ -50,7 +52,6 @@ namespace EasyAbp.EShop.Products
             CreateMap<ProductType, ProductTypeDto>();
             CreateMap<CreateUpdateProductTypeDto, ProductType>(MemberList.Source);
             CreateMap<ProductCategory, ProductCategoryDto>();
-            CreateMap<CreateUpdateProductCategoryDto, ProductCategory>(MemberList.Source);
             CreateMap<ProductHistory, ProductHistoryDto>();
             CreateMap<ProductDetailHistory, ProductDetailHistoryDto>();
         }
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/Product.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/Product.cs
index 22787762..67d5f1f6 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/Product.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/Product.cs
@@ -68,6 +68,12 @@ namespace EasyAbp.EShop.Products.Products
             ProductSkus = new List<ProductSku>();
         }
 
+        public void InitializeNullCollections()
+        {
+            ProductAttributes ??= new List<ProductAttribute>();
+            ProductSkus ??= new List<ProductSku>();
+        }
+
         public void TrimCode()
         {
             Code = Code?.Trim();
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/EditModal.cshtml.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/EditModal.cshtml.cs
index 6244d478..0663b796 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/EditModal.cshtml.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/Pages/EShop/Products/Products/Product/EditModal.cshtml.cs
@@ -4,6 +4,8 @@ using System.Linq;
 using System.Threading.Tasks;
 using EasyAbp.EShop.Products.Categories;
 using EasyAbp.EShop.Products.Categories.Dtos;
+using EasyAbp.EShop.Products.ProductCategories;
+using EasyAbp.EShop.Products.ProductCategories.Dtos;
 using EasyAbp.EShop.Products.ProductDetails;
 using EasyAbp.EShop.Products.ProductDetails.Dtos;
 using Microsoft.AspNetCore.Mvc;
@@ -32,17 +34,20 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product
         private readonly IProductTypeAppService _productTypeAppService;
         private readonly ICategoryAppService _categoryAppService;
         private readonly IProductDetailAppService _productDetailAppService;
+        private readonly IProductCategoryAppService _productCategoryAppService;
         private readonly IProductAppService _service;
 
         public EditModalModel(
             IProductTypeAppService productTypeAppService,
             ICategoryAppService categoryAppService,
             IProductDetailAppService productDetailAppService,
+            IProductCategoryAppService productCategoryAppService,
             IProductAppService service)
         {
             _productTypeAppService = productTypeAppService;
             _categoryAppService = categoryAppService;
             _productDetailAppService = productDetailAppService;
+            _productCategoryAppService = productCategoryAppService;
             _service = service;
         }
 
@@ -63,6 +68,12 @@ namespace EasyAbp.EShop.Products.Web.Pages.EShop.Products.Products.Product
             var detailDto = await _productDetailAppService.GetAsync(productDto.ProductDetailId);
             
             Product = ObjectMapper.Map<ProductDto, CreateEditProductViewModel>(productDto);
+
+            Product.CategoryIds = (await _productCategoryAppService.GetListAsync(new GetProductCategoryListDto
+            {
+                ProductId = productDto.Id,
+                MaxResultCount = LimitedResultRequestDto.MaxMaxResultCount
+            })).Items.Select(x => x.CategoryId).ToList();
             
             Product.ProductDetail = new CreateEditProductDetailViewModel
             {
diff --git a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/ProductsWebAutoMapperProfile.cs b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/ProductsWebAutoMapperProfile.cs
index 389f8af0..431171a2 100644
--- a/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/ProductsWebAutoMapperProfile.cs
+++ b/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Web/ProductsWebAutoMapperProfile.cs
@@ -20,8 +20,9 @@ namespace EasyAbp.EShop.Products.Web
              * Alternatively, you can split your mapping configurations
              * into multiple profile classes for a better organization. */
             CreateMap<ProductDto, CreateEditProductViewModel>()
-                .Ignore(dto => dto.ProductDetail)
-                .Ignore(dto => dto.StoreId)
+                .Ignore(model => model.CategoryIds)
+                .Ignore(model => model.ProductDetail)
+                .Ignore(model => model.StoreId)
                 .ForSourceMember(dto => dto.ProductDetailId, opt => opt.DoNotValidate())
                 // .Ignore(x => x.ProductAttributes);
                 .ForMember(dest => dest.ProductAttributeNames,