Disclosed is a labelling head with a label detection function and applicable to an electric energy meter labelling machine. The labelling head comprises a labelling head installation plate, a label suction disc, a labelling head locating block, guide shafts, a linear cylinder and a linear cylinder stroke adjusting block. The labelling head locating block is fixed to the labelling head installation plate. A cylinder body of the linear cylinder is fixed to the labelling head locating block, and a piston rod and the linear cylinder stroke adjusting block are in transmission connection. One end of each guide shaft is fixedly connected with the linear cylinder stroke adjusting block, and the other end of each guide shaft penetrates through the labelling head locating block and is connected with the label suction disc. A plurality of screening holes are uniformly distributed in the label suction disc and communicated with a gas outlet channel and a gas inlet channel through a gas channel adjusting valve. A color mark sensor is further arranged on the labelling head installation plate and connected with an alarm through signals. The labelling head is compact in structure and flexible to control. When labels are pasted in an inclined mode, or missed or folded, an alarm signal can be timely outputted, the label adhesion quality is guaranteed, and the working efficiency of the electric energy meter labelling machine is improved.