Cooking device and detection method and control method thereof

The invention discloses a cooking device as well as a detection method and a control method thereof. The cooking device comprises a stove and a gas pipe for supplying gas to the stove, the cooking device further comprises a detection module, the detection module comprises a sensing module arranged on the outer side of the pipe wall of the gas pipe, the sensing module comprises a first sound wave emitter, a first sound wave receiver, a second sound wave emitter and a second sound wave receiver, and the first sound wave emitter and the first sound wave receiver are oppositely arranged to form a group of sound wave receiving and transmitting sensors; the second sound wave emitter and the second sound wave receiver are also oppositely arranged to form a group of sound wave transmitting and receiving sensors, the two groups of sound wave transmitting and receiving sensors are arranged at intervals in the length direction of the gas pipe, and the first sound wave emitter and the second sound wave receiver are arran