The invention discloses a ZigBee-based center-node-free ad hoc networking method. Other equipment within a communication range is detected after equipment is powered on to flexibly decide an own network startup type, and the equipment can make a judgment of building a network or making an access to the network according to an own power-on time sequence. Specific to the aim of avoiding the situation of coexistence of a plurality of networks, a network convergence mechanism is put forward and implemented, so that the equipment can only build a unique network. Through adoption of the method, allequipment in the network are equal in status, and special equipment does not exist. When any equipment fails or is not powered on, work of other equipment as well as normal building and running of thenetwork are not influenced, so that the flexibility of an ad hoc network is enhanced, and the ad hoc network can be applied to monitoring of cluster equipment in a severe environment. The method is designed and implemented on the basis of a Z-Stack protocol. Specific to the problems that different equipment in Z-Stack needs to download different codes and special equipment such as a coordinator needs to be included in the equipment and the like, an ad hoc networking method which does not need any special equipment with all equipment codes being the same is designed and implemented.