Control method and device for air conditioner and air conditioner

The invention discloses a control method and a control device for an air conditioner and the air conditioner. The control method and the control device solve the problem that the air conditioner cannot be remotely controlled in the prior art. The control method for the air conditioner comprises that: the control device transmits control instructions to the air conditioner through a communication network; and the air conditioner receives the control instructions from the communication network, and then adjusts the working condition according to the control instructions or transmits response information to the control device through the communication network. By using the technical scheme, the operation distance limitation of a remote controller can be broken, the control of the air conditioner is realized in the range covered by the communication network, the operation of the air conditioner can be adjusted by a user at a different place, and information related with the operation of the air conditioner can be acquired.