The present invention provides a smart space access method, a system, a controller, and a smart space interface server. The smart space access method includes: determining, by a controller according to an obtained smart space number and current location information, that the controller enters a smart space in a smart space list stored by the controller, where the smart space corresponds to the smart space number; receiving a main mobile code corresponding to the smart space sent by an interface server of the smart space; and loading and executing the main mobile code, displaying a main service interface of the smart space, generating a smart space request according to a service number of a selected application, sending the smart space request to the interface server, receiving, loading, and executing a result mobile code sent by the interface server, and displaying a processing result of the selected application. According to the present invention, access to different smart applications in different smart spaces can be implemented in a uniform manner by using a single controller without preinstalling a control program of a smart space, thereby providing a good expansibility.
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