Abstract: An electricity-saving type infrared electronic lock core is disclosed herein, which includes a body, an infrared sensor, a radio frequency identification system and a power supplier. The infrared sensor is disposed on one end of the body and includes an infrared receiver-transmitter, and the radio frequency identification system is electrically connected with the infrared sensor, the power supplier and the relative elements for unlocking the body. When the infrared sensor detects a person or an object within the scheduled area, the radio frequency identification system can identify it and further drive the relative elements for unlocking the body if the identification is correct. But when the infrared sensor does not detect a person or an object, the radio frequency identification system enters into an electricity-saving mode for saving the electric power.