Embodiments of the present application relate to the technical field of cloud computation. Provided are a web app access method, apparatus, and system. The method comprises: acquiring a web page document and an identity authentication token for web app from a first server; loading a web app file in a third server into the web page document; and calling various cloud interfaces of a cloud server by means of the loaded web app file based on the identity authentication token to interact with the cloud server. According to the present application, the degree of coupling of web app is low, and the web app can be flexibly transplanted and reused.