The invention discloses an open Internet of Things service supporting cloud platform system. The cloud platform system comprises a user management unit, an instant communication unit, a remote control and management unit, a data processing unit and a cloud storage unit. The cloud platform system achieves closed ecological supporting of a mobile phone client, a robot terminal and a cloud server to effectively achieve data communication and joint management of the three terminals by applying an SDK and a network library on the basis of Web improvement, supports a free merchant operation management system, a free application market and test services, is not only suitable for places such as restaurants, education organizations and cinemas, but also can be applied to various scenes at home and binds users with merchants to jointly make an intelligent life circle.