Mobile telephone system and mobile telephone set

The present invention relates to a mobile telephone and mobile telephone systems. A mobile telephone system according to the present invention, comprising: a network; a mobile phone can be connected to the network; a server connected to said network, a service application storing and application key, the application service by the application of manufacturing the manufacturers, based on the application key of the service application, and application programming interface by a manufacturer for manufacturing the mobile phone disclosed, and determining said service application, and application program interfaces associated key arrangement, the above-described mobile phone to access the server, and downloads application of said key and said service application, said service application by parsing the application and key configuration decision key, the key arrangement shown in the display.