The utility model relates to a state and energy consumption system for nodes of a sensor network, which is characterized by comprising a plurality of node energy consumption monitoring units and a monitoring centralized unit, wherein each node energy consumption monitoring unit respectively corresponds to one node of the wireless sensor network, all the node energy consumption monitoring units are used for sending monitoring data of monitoring the nodes of the wireless sensor network and corresponding node batteries thereof to the monitoring centralized unit and monitoring each node of the wireless sensor network and each node battery; each node energy consumption monitoring unit is used for receiving a monitoring command of the monitoring centralized unit and transmitting the monitoring data to the monitoring centralized unit; and the monitoring centralized unit is used for sensing the monitoring commands and receiving the monitoring data sent by all the node energy consumption units. By adopting the system, energy consumption of the batteries of the sensor nodes in an actual scene application can be monitored, and the operation state of each node can also be monitored, thereby providing basic data for WSN (wireless sensor network) operational control decision making and being widely applied in design applications of the sensor network.