Abstract: In order to meet the needs of CNC enterprises, the construction method of intelligent manufacturing system based on CPS was explored. It uses Visual C# programming language and SQL Server database management system. The system functionally not only can collect process and save the running data of networked CNC machines, but also realize the management of production information, and allow users to customize basic data such as all machine types and all worker levels according to the specific situation of the enterprise. The algorithm and implementation techniques for reading the counter value of CNC machine to record the batch processing quantity of each CNC machine for a specific product is discussed, and the test effect of this algorithm is given.