Multi-subsystem linkage method of intelligent building service system

The invention provides a multi-sub-system linkage method of an intelligent building service system. The linkage method comprises the following steps: subsystem API registration, call chain arrangement, subsystem abnormal information acquisition, subsystem call chain analysis and abnormal view generation, and multi-subsystem linkage processing, wherein the service flow between the abnormal subsystem and the system is recovered, a reverse/recovery API arranged in a forward compensation or API call chain and other subsystem related API referred in the API call chain are automatically called, thereby guaranteeing the linkage consistency among all subsystems. By use of the linkage method provided by the invention, each subsystem controls the abnormal information to dump to an abnormal processing center to recover the service scene between the abnormal subsystem and the system and analyze whether the subsystem data under the abnormal scene is consistent, thereby realizing the consistency processing of the subsystem