Key structure, keyboard and keyboard control method

The invention relates to the field of keyboards, and discloses a key structure which comprises a cover body, a moving assembly, a circuit assembly and a conduction assembly, the circuit assembly comprises a first circuit piece and a second circuit piece, and when the moving assembly moves downwards in the vertical direction, the first circuit piece, the second circuit piece and the conduction assembly are driven to generate circuit state changes. Therefore, the key structure can be switched among the initial state, the first communication state and the second communication state. The invention further discloses a keyboard, the keyboard comprises the key structure, and first-order and second-order control can be achieved. The invention further discloses a keyboard control method which comprises the steps that keyboard circuit scanning is conducted, a scanning result is output, whether the key mode of the keyboard is the first-order key mode or the second-order key mode is determined based on the circuit scanni