There has been no in-depth historical study on specific number of Model Operas. This essay holds that Model Operas can be divided into three successive batches diachronically, they can also be divided into mature typical,immature experimental and planning works according to their maturity. The number of Model Operas can be defined in either a narrow or a broad perspective. Narrowly, there are eighteen-eight in the first batch, ten in the second. Broadly, there are thirty-two-seven experimental ones and seven planned ones other than the first two batches.