Software copyright control method and system

The invention relates to a software copyright control method and system. The software copyright control method includes that a client periodically sends a copyright authentication request on a software to a server; the server receives the copyright authentication request, compares copyright authentication information of the copyright authentication request with copyright information in a data bank, generates copyright control information according to a comparison result and a presupposed copyright control strategy and returns the copyright control information to the client; and the client performs a copyright control operation on the software. The software copyright control method and system achieves the copyright control in combination with the client which is deployed with the software simultaneously to improve the flexibility of software authentication and safety of software.