In order to resolve the problems of low degree of automation, high costs,etc. in Ostrea rivularis Gould farming, a monitoring system based on cloud space for Ostrea rivularis Gould farming is brought up. The system adopts STM32F103 as the core of bottom control, collects real-time data of the seawater’s pH, dissolved oxygen, temperature and depth through YS8166B, SIN-D0530 and ultrasonic modules, which will be wirelessly sent to the upper computer via nRF24L01. The upper computer adopts C# multi-thread communication program to interact with cloud space. The system adopts cloud space based on the ASP dynamic technology and the lightweight data interchange format JSON to fastly communicate with the upper computer and users, and provides no refresh display by utilizing AJAX. This allows users access to cloud space anytime and anywhere via intelligent mobile phones, and obtain real-time information at the farming site. Meanwhile, according to the local weather information embedded in cloud space, users can control floating row motors, oxygen generators and dispensers remotely. Tests showed that the system has the advantages of low costs, stability and reliability, fast response and so on. This monitoring system based on cloud space provides a new method for the intellectualization of Ostrea rivularis Gould farming.