Network schedule is an important part in construction organization and design in hydraulic and hydropower engineering. As most network schedule software provided limited functionality in schedule generation and analysis， leading to network schedule generation is time-consuming， laborious， inefficient， and low degree of standardization. Based on analysis of connotation of network standardization in hydraulic and hydropower engineering， this paper discussed the basic content of the network schedule standardization， developed the standardization system of network schedule in hydraulic and hydropower engineering， and introduced functions as network schedule aided generation， analysis， evaluation and review， as well as the output of results in detail. The system interface is friendly and intuitive visualization， and provides powerful computing and optimization capabilities， greatly improving the efficiency and quality of the preparation of the network schedule to engineering staffs， and provides a new way and means in quickly generating， analyzing and optimizing the network schedule.