The invention relates to a distributed generation microgrid system, in particular to a monitoring system applicable to different types of wind photovoltaic storage microgrid systems. The monitoring system comprises a communication conversion module, a communication bus, total communication conversion modules, a monitoring work station, a database server and a remote Web server, wherein the controller of each subsystem of the wind photovoltaic storage microgrid system is connected with different communication conversion modules in a one-to-one correspondence mode; the communication conversion modules are connected with the total communication conversion module through the communication bus; and the total communication conversion module is connected with the monitoring work station, the database server and the remote Web server. The monitoring system has the effects of controlling, monitoring and detecting a wind generating set, a diesel engine unit, a photovoltaic generating set, an energy storage device, a power distribution measuring and control device, a protective device and the like of the whole wind photovoltaic storage microgrid system, so that the microgrid system can stably operate under a grid mode and an island mode. The monitoring system can control each subsystem of the microgrid and detect the operation parameters of the microgrid.