Information subscribing and information broadcasting method and system with cross-network collaboration

The invention relates to an information subscribing and information broadcasting method and system with cross-network collaboration. The information subscribing and information broadcasting method comprises the following steps that: step 1, a terminal sends user operation information to a front end system by virtue of a two-way network; step 2, a front end statistics server updates a content source-user subscribing list; step 3, user state information is sent to the front end statistics server regularly by the terminal; step 4, an optimal broadcasting dispatch result is calculated regularly by a front end dispatch server; and step 5, media content is broadcasted to the terminal by a front end broadcasting server. The information subscribing and information broadcasting method system comprises the front end system and the terminal, wherein the front end system is communicated with the terminal by a one-way network or the two-way network; and the front end system is provided with the statistics server, the dispatch server and the broadcasting server. According to the information subscribing and information broadcasting method system, an information response method of the front end system is improved, a bandwidth allocation method of information subscribing and information broadcasting with diverse types and unequal data size is provided, and the bandwidth allocation method is optimized by a simulated annealing algorithm.