The invention relates to a wireless sensor network scheduling method and a system based on TDMA (Time Division Multiple Access) fast total network synchronous support frequency hopping, which are applicable to acquisition and monitoring of data of low-power-consumption equipment. The system consists of a gateway node, a plurality of cluster head nodes forming MESH network, a plurality of wirelesssensor nodes and transmission nodes forming a star-type network and a plurality of selectable relay nodes. The system fuses cluster-cluster communication and cluster-in communication for realization,and supports a fast total network synchronization strategy and provides technical support for low power consumption and real-time performance simultaneously. The system supports a frequency hopping design, can carry out simultaneous communication between the adjacent cluster nodes and provides technical support on real-time performance and scale networking. For certain simple application scenes, the system can not comprise a cluster-cluster communication part but only a cluster-in communication part, and consists of one cluster head node and the wireless sensor nodes to which the cluster headnode belongs and the selectable relay nodes.