Combined with the experience of CMADaaS platform business trial operation and maintenance, this paper gives the application skills of service interface in client development and system integration from the technical perspective of meteorological forecast service personnel, including using functional programming to simplify the call and implementation of service interface, introducing a “retry” mechanism to ensure the success rate of interface call, using JSON return data to improve the efficiency of cloud platform meteorological element information extraction and processing, mastering the skills of avoiding system access restrictions to improve the application R&D experience. The results show that the open-source “Tianqing” cloud service algorithm and a series of software packages can deepen the application staff’s understanding of the system operation mechanism and service concept. They can promote the efficient and safe use of the meteorological big data cloud platform and the deep integration of the meteorological business system.