An electronic device that requires setup of plural setting items upon initial startup operations, the electronic device comprising: a storage unit that stores designated setting information and setting status information indicating whether the setting items has been set up, the designated setting information and the setting status information being stored and updated each time the setup of one of the setting items is completed; and a startup processing unit that refers to the storage unit upon performing startup operations to determine whether at least one of the setting items have been set up and starts setup operations for the setting items that have not yet been set up, characterized in that the electronic device further comprises: a transmission terminal that transmits and receives data to be shared with another transmission terminal and outputs image data to a display device, wherein the startup processing unit reads setting status information from the storage unit when the power of the transmission terminal is turned on, determines a startup operation mode corresponding to the setting status information, and performs startup operations based on the setting status information, wherein the setting items include a language setting for selecting a language to be used in a user interface, a format/time zone setting for selecting a format/time zone corresponding to a region in which the electronic device is situated, and a network setting for setting up network information of the electronic device. a storage unit that stores designated setting information and setting status information indicating whether the setting items has been set up, the designated setting information and the setting status information being stored and updated each time the setup of one of the setting items is completed; and a startup processing unit that refers to the storage unit upon performing startup operations to determine whether at least one of the setting items have been set up and starts setup operations for the setting items that have not yet been set up, the electronic device further comprises: a transmission terminal that transmits and receives data to be shared with another transmission terminal and outputs image data to a display device, wherein the startup processing unit reads setting status information from the storage unit when the power of the transmission terminal is turned on, determines a startup operation mode corresponding to the setting status information, and performs startup operations based on the setting status information, wherein the setting items include a language setting for selecting a language to be used in a user interface, a format/time zone setting for selecting a format/time zone corresponding to a region in which the electronic device is situated, and a network setting for setting up network information of the electronic device. a transmission terminal that transmits and receives data to be shared with another transmission terminal and outputs image data to a display device, wherein the startup processing unit reads setting status information from the storage unit when the power of the transmission terminal is turned on, determines a startup operation mode corresponding to the setting status information, and performs startup operations based on the setting status information, wherein the setting items include a language setting for selecting a language to be used in a user interface, a format/time zone setting for selecting a format/time zone corresponding to a region in which the electronic device is situated, and a network setting for setting up network information of the electronic device.