The invention discloses a sensor network based fan management system and working method. The fan management system comprises convergence nodes, a plurality of sensor nodes distributed in a room and provided with numbers and a plurality of intelligent fans controlled by the convergence nodes, wherein the sensor nodes are suitable for sensing of human body orientation and indoor temperature, and the convergence nodes are used for achieving automatic control of the intelligent fans according to the human body orientation and indoor temperature and sending indoor data, namely the human body orientation, temperature information and the numbers of the sensor nodes to an upper computer. The sensor network based fan management system can effectively apply the intelligent fans to occasions including dorms, offices and the like, enable people to feel cool and meanwhile saves electric energy. In addition, weight and temperature information query and intelligent fan control performed by of a computer and mobile phone can be achieved.