The invention provides an over-the-air upgrading control method and a device of a cloud television. A television terminal firstly receives a first attribute value of a to-be-downloaded upgrading packet sent by a server and returns response information for stopping pushing the upgrading packet to the server when determining that the difference value between user partition rest space and the occupied first attribute value for operating the to-be-downloaded upgrading packet is smaller than a set value. Thus, a problem of a failure to start the television terminal or applications, or abnormity of the server caused by insufficient user partition rest space after the upgrading packet has been downloaded is avoided, thereby ensuring reliable use of the television terminal or the applications, improving reliability of the television terminal and improving user experience.