A method of controlling access of an application is provided. A server receives, from a device, a request to access a hybrid operating system interface (HOSI) for managing at least one application executed respectively on different operating systems (OSs), authenticates the device based on the request received to access the HOSI, determines an application corresponding to the request received from the device, from among the at least one application, when the device is authenticated, and transmits, to the device, data according to execution of the determined application.