The present invention provides a refrigerator. The refrigerator comprises a box body with a chamber, a door body connected with the box body and used for opening or closing the chamber, and a yogurt machine arranged on the chamber or the door body. The box body also comprises a first air duct communicated with the chamber, an evaporator and draught fans disposed inside the first air duct. The yogurt machine is provided with a yogurt box, a heating element disposed inside the yogurt box, a temperature sensing element fixed on the yogurt box and used for detecting temperature inside the yogurt box, and a control mechanism. The box body is also provided with a second air duct for supplying cold air into the yogurt box, and the yogurt box is provided with an air vent corresponding to the second air duct. The box body and/or the yogurt box is also provided with a first air door for opening or closing the second air duct and a first motor for controlling the first air door, and the first motor is electrically connected with the control mechanism.