In order to realize the construction objective of ‘great operation architecture’, it is necessary for all of the dispatching control centers including their branches to adopt the integrated mode of dispatching and control and have the power system equipment monitoring functions. According to the integration requirements of dispatching and control functions, based on smart grid dispatching and control systems, the architecture of multi-subject intelligent integrated alarm and some key technologies are provided, such as support platform integrated time sequence database, operation data smart analysis and multi-subject exhibition, running way and maintenance information real-time correlation, and detection of power system events. Application in field practice verifies the validity and practicability of the research results.