The invention relates to a method for controlling a front-end device by a video monitor platform based on an SIP server cluster. The video monitor platform based on an SIP server cluster refers to a structure that a WEB server with an SIP signaling route function is respectively connected with a plurality of SIP proxy servers; a client end logs in a WEB page by accessing the WEB server and utilizes an SIP request and carries out signaling route by the SIP proxy servers so as to establish a conversation between the WEB server and an SIP gateway connected with a front-end device; the SIP gateway obtains the control information of the front-end device, builds instructions acceptable for the front-end device to control the front-end device and feeds back the controlled results of the front-end device to the WEB server by the SIP proxy servers; the WEB server stores the controlled results to a local database. The method can meet the requirements of large-size video monitoring and video commanding and dispatching which are interconnected and interoperable.