An oven, comprising: an oven body; and a gas circuit system and an electric circuit system, both of which are installed on the oven body; wherein the gas circuit system comprises: a gas pipeline installed on the oven body; a combustor installed in the oven body and being in communication with an outlet of the gas pipeline; a control switch installed on the gas pipeline; and an electric control valve installed on the gas pipeline and controlling connection and disconnection of the gas pipeline together with the control switch; the electric circuit system comprises: a controller installed on the oven body, connected to the electric control valve and matched with the control switch for use, wherein when the control switch is turned on, the controller switches on the electric control valve, and when the control switch is turned off, the controller switches off the electric control valve; characterized in that the electric circuit system further comprises: a timer installed on the oven body and connected to the controller, and when the timer times out, the timer can control the controller to switch off the electric control valve, so that the electric control valve disconnects the gas pipeline; a linked switch installed between the timer and the controller and matched with the control switch for use; wherein when the control switch is turned on, the linked switch is turned on, and when the control switch is turned off, the linked switch is turned off, and wherein, the timer is connected to a main path of the electric circuit system in parallel, and the linked switch and the controller are connected to the main path of the electric circuit system in series. an oven body; and a gas circuit system and an electric circuit system, both of which are installed on the oven body; wherein the gas circuit system comprises: a gas pipeline installed on the oven body; a combustor installed in the oven body and being in communication with an outlet of the gas pipeline; a control switch installed on the gas pipeline; and an electric control valve installed on the gas pipeline and controlling connection and disconnection of the gas pipeline together with the control switch; the electric circuit system comprises: a controller installed on the oven body, connected to the electric control valve and matched with the control switch for use, wherein when the control switch is turned on, the controller switches on the electric control valve, and when the control switch is turned off, the controller switches off the electric control valve; characterized in that the electric circuit system further comprises: a timer installed on the oven body and connected to the controller, and when the timer times out, the timer can control the controller to switch off the electric control valve, so that the electric control valve disconnects the gas pipeline; a linked switch installed between the timer and the controller and matched with the control switch for use; wherein when the control switch is turned on, the linked switch is turned on, and when the control switch is turned off, the linked switch is turned off, and wherein, the timer is connected to a main path of the electric circuit system in parallel, and the linked switch and the controller are connected to the main path of the electric circuit system in series. a gas pipeline installed on the oven body; a combustor installed in the oven body and being in communication with an outlet of the gas pipeline; a control switch installed on the gas pipeline; and an electric control valve installed on the gas pipeline and controlling connection and disconnection of the gas pipeline together with the control switch; the electric circuit system comprises: a controller installed on the oven body, connected to the electric control valve and matched with the control switch for use, wherein when the control switch is turned on, the controller switches on the electric control valve, and when the control switch is turned off, the controller switches off the electric control valve; characterized in that the electric circuit system further comprises: a timer installed on the oven body and connected to the controller, and when the timer times out, the timer can control the controller to switch off the electric control valve, so that the electric control valve disconnects the gas pipeline; a linked switch installed between the timer and the controller and matched with the control switch for use; wherein when the control switch is turned on, the linked switch is turned on, and when the control switch is turned off, the linked switch is turned off, and wherein, the timer is connected to a main path of the electric circuit system in parallel, and the linked switch and the controller are connected to the main path of the electric circuit system in series. a timer installed on the oven body and connected to the controller, and when the timer times out, the timer can control the controller to switch off the electric control valve, so that the electric control valve disconnects the gas pipeline; a linked switch installed between the timer and the controller and matched with the control switch for use; wherein when the control switch is turned on, the linked switch is turned on, and when the control switch is turned off, the linked switch is turned off, and wherein, the timer is connected to a main path of the electric circuit system in parallel, and the linked switch and the controller are connected to the main path of the electric circuit system in series.