The embodiment of the invention discloses a control method of a split television, and belongs to the technical field of smart televisions. The split television comprises a stable module and an upgraded upgrading module. The control method comprises the steps: according to the first configuration information of the stable module, determining first communication command format information for information transmission between the upgrading module and the stable module, converting control command information to be output by the upgrading module into control information matched with the first communication command format information, and controlling the stable module according to the control information. In the upgrading process of the television, additional equipment such as an additional settop box or a network box does not need to be added, the use habit of a user is not changed, and the user experience effect is good. The embodiment of the invention further discloses a split televisioncontrol device and a computer readable storage medium.