Abstract: A carbon credit registration method includes the following steps: a reading device reads an electronic tag disposed on an object to obtain an identification code, where the identification code corresponds to a company; a communication device electrically connected to the reading device sends the identification code to a cloud host; the cloud host searches a database based on the identification code to obtain a corresponding stored record; and when it is confirmed that the stored record has a processing proof, the cloud host sends an authorization signal to the communication device, sets a used mark on the stored record in the database, and registers a carbon credit feedback value for the company in the storage record, where the carbon credit feedback value is related to the type of the object.