In order to improve the stability and economy of the island limited capacity system, multiple same type or different type generator sets are operated in parallel to realize the output expansion of the system. The parallel control and load distribution strategy of the generator sets are the core factors which determine the stability of the system. Thus, a diesel generator sets control system is designed based on CAN bus. Firstly, the integrated design for the CAN bus control system is carried out. Secondly, according to the requirements of parallel operation of the diesel generator sets, the control strategies of speed and voltage regulation, and load balancing distribution are analyzed and studied. The parallel control and load distribution strategies are formulated. Lastly, combined with engineering application cases, the application of the control system is successfully realized for the same type and different type generator sets. The system also has perfect engine fuel control and fault diagnosis functions.