A refrigerator, comprising: a refrigerator body having an open front side to define a first compartment; a primary door mounted to the refrigerator body and used for opening/closing the first compartment, the primary door defining a second compartment having an open front side; and a secondary door mounted to the primary door and used for opening/closing the second compartment, the secondary door comprising a state adjustable door panel, and the state adjustable door panel being configured to controllably change transparency such that the visibility of an internal structure of the second compartment is adjustable; characterized in that a rear wall of the primary door is provided with an air supply port and a return air port which are communicated with the first compartment and the second compartment; the rear wall is hollow, a condensation removing air duct communicated with the first compartment is defined in the rear wall, and a plurality of condensation removing holes communicated with the second compartment and the condensation removing air duct are formed in the front surface of the rear wall backwards; the refrigerator is configured to: be in a cooling cycle mode where air in the first compartment enters the second compartment through the air supply port and then returns to the first compartment through the return air port; or in a condensation removing mode where the air in the first compartment enters the condensation removing air duct, so as to allow part of the air flow to flow to the front surface of the rear wall through the condensation removing holes to remove surface condensation of the rear wall. a refrigerator body having an open front side to define a first compartment; a primary door mounted to the refrigerator body and used for opening/closing the first compartment, the primary door defining a second compartment having an open front side; and a secondary door mounted to the primary door and used for opening/closing the second compartment, the secondary door comprising a state adjustable door panel, and the state adjustable door panel being configured to controllably change transparency such that the visibility of an internal structure of the second compartment is adjustable; characterized in that a rear wall of the primary door is provided with an air supply port and a return air port which are communicated with the first compartment and the second compartment; the rear wall is hollow, a condensation removing air duct communicated with the first compartment is defined in the rear wall, and a plurality of condensation removing holes communicated with the second compartment and the condensation removing air duct are formed in the front surface of the rear wall backwards; the refrigerator is configured to: be in a cooling cycle mode where air in the first compartment enters the second compartment through the air supply port and then returns to the first compartment through the return air port; or in a condensation removing mode where the air in the first compartment enters the condensation removing air duct, so as to allow part of the air flow to flow to the front surface of the rear wall through the condensation removing holes to remove surface condensation of the rear wall. be in a cooling cycle mode where air in the first compartment enters the second compartment through the air supply port and then returns to the first compartment through the return air port; or in a condensation removing mode where the air in the first compartment enters the condensation removing air duct, so as to allow part of the air flow to flow to the front surface of the rear wall through the condensation removing holes to remove surface condensation of the rear wall.