A method for assessing video encoding quality, comprising: acquiring a quantization parameter of a slice of a video frame of a video stream and a quantity of bytes per pixel of the slice of the video frame of the video stream; determining a quantization parameter of a video according to the quantization parameter of the slice of the video frame of the video stream, and determining complexity of content of the video according to the quantity of bytes per pixel of the slice of the video frame of the video stream; wherein the determining complexity of content of the video according to the quantity of bytes per pixel of the slice of the video frame of the video stream comprises: determining a quantity of bytes per pixel of the k th slice among Num slices of the video frame as follows: f_slice_byte_per_pixel k = i_slice_size k i_slice_pixel k, wherein i_slice_size k is a quantity of bytes of the k th slice among the Num slices of the video frame, i_slice_pixel k is a quantity of pixels of the k th slice among the Num slices of the video frame, and k is a positive integer, wherein in the video frame, k ranges from 1 to Num, and Num is a positive integer; determining complexity of content of the k th slice among the Num slices of the video frame as follows: f_slice_content_complexity k = a i_slice_qp k ⋅ f_slice_byte_per_pixel k + b i_slice_qp k, wherein both a[i_slice_qp k] and b[i_slice_qp k] are values corresponding to a quantization parameter of the k th slice among the Num slices of the video frame; determining complexity of content of the video frame as follows: f_frame_content_complexity = ∑ k = 1 Num f_slice_content_complexity k Num and determining the complexity of content of the video according to the complexity of content of the video frame; and predicting the video encoding quality according to the complexity of content of the video and the quantization parameter of the video. acquiring a quantization parameter of a slice of a video frame of a video stream and a quantity of bytes per pixel of the slice of the video frame of the video stream; determining a quantization parameter of a video according to the quantization parameter of the slice of the video frame of the video stream, and determining complexity of content of the video according to the quantity of bytes per pixel of the slice of the video frame of the video stream; wherein the determining complexity of content of the video according to the quantity of bytes per pixel of the slice of the video frame of the video stream comprises: determining a quantity of bytes per pixel of the k th slice among Num slices of the video frame as follows: f_slice_byte_per_pixel k = i_slice_size k i_slice_pixel k, wherein i_slice_size k is a quantity of bytes of the k th slice among the Num slices of the video frame, i_slice_pixel k is a quantity of pixels of the k th slice among the Num slices of the video frame, and k is a positive integer, wherein in the video frame, k ranges from 1 to Num, and Num is a positive integer; determining complexity of content of the k th slice among the Num slices of the video frame as follows: f_slice_content_complexity k = a i_slice_qp k ⋅ f_slice_byte_per_pixel k + b i_slice_qp k, wherein both a[i_slice_qp k] and b[i_slice_qp k] are values corresponding to a quantization parameter of the k th slice among the Num slices of the video frame; determining complexity of content of the video frame as follows: f_frame_content_complexity = ∑ k = 1 Num f_slice_content_complexity k Num and determining the complexity of content of the video according to the complexity of content of the video frame; and predicting the video encoding quality according to the complexity of content of the video and the quantization parameter of the video. determining a quantity of bytes per pixel of the k th slice among Num slices of the video frame as follows: f_slice_byte_per_pixel k = i_slice_size k i_slice_pixel k, wherein i_slice_size k is a quantity of bytes of the k th slice among the Num slices of the video frame, i_slice_pixel k is a quantity of pixels of the k th slice among the Num slices of the video frame, and k is a positive integer, wherein in the video frame, k ranges from 1 to Num, and Num is a positive integer; determining complexity of content of the k th slice among the Num slices of the video frame as follows: f_slice_content_complexity k = a i_slice_qp k ⋅ f_slice_byte_per_pixel k + b i_slice_qp k, wherein both a[i_slice_qp k] and b[i_slice_qp k] are values corresponding to a quantization parameter of the k th slice among the Num slices of the video frame; determining complexity of content of the video frame as follows: f_frame_content_complexity = ∑ k = 1 Num f_slice_content_complexity k Num and determining the complexity of content of the video according to the complexity of content of the video frame; and predicting the video encoding quality according to the complexity of content of the video and the quantization parameter of the video.