The invention discloses a collaborative case handling method. The method includes the following steps that firstly, a manager establishes a virtual case handling platform; secondly, a case handling person logs into the virtual case handling platform through the Internet; thirdly, resource allocation, task sharing, information sharing and collaborative case handling are conducted; fourthly, the person quits the virtual case handling platform after case handling is finished. The invention further discloses a system based on the method. The system comprises a server, a command office, a technology office, a conference room, a case handling room and an evidence obtaining office. The server is connected with devices in the offices. The case handling platform based on the network can have the communication function, the technical assistance function, the report function, the command function, the data sharing function and other functions, the collaborative case handling capacity of all local public security organizations is improved, the work efficiency and interoperability are improved, the case progress can be rapidly known, and the resource utilization rate is increased.