The present invention relates to a system and method for a product process route, which is a computer simulation system and method for a product production process, including a file reading module, a basic data module, a custom attribute module, a product process model module, a route simulation module and The production scheduling optimization module, among them, the file reading module is used to read the data of the product design system and put it into the product process model module; the basic data module is used to set the status data of the production site; the custom attribute module is used to It is used to maintain the attributes of the calculation parameters that constitute the product bill of materials and product process; the product process model module is used to manage the product process model for establishing product process routes; the route simulation module is used to calculate the process route according to the product process model, and to process Routes are managed; the production scheduling optimization module is used to change the process route replacement conditions of the route simulation module to obtain the optimal scheduling result. The system simulates or optimizes the product process route, saving cost, time and effort.