In order to solve the shortcomings of the smart campus message system constructed by the current method in network indicators, data processing, business interface, human-computer interaction, and other technologies, a cloud computing algorithm-based smart campus message system construction method was proposed. In this method, the LAN interconnection, the network multimedia terminal, and the network architecture platform were established by the cloud computing algorithm. This method established the awareness of smart campus development, established the cloud smart campus management norm system, and constrained the network environment based on the cloud smart campus. The overall structure of the smart campus message system was constructed from the technical level, the main layer, and the constraint layer. The functional module analysis of the smart campus message system software was performed, which had two major categories, including basic function modules and extended function modules. It achieved the construction of a smart campus messaging system based on cloud computing algorithms. The experimental results showed that the proposed method had obvious advantages in network indicators, data processing, business interface, human-computer interaction and other technologies which can bring a lot of convenience to the school staff.