A gas detection apparatus includes a housing, a detection assembly, and a data acquiring module. The housing includes a chamber, an air inlet, and an air outlet. The air inlet and the air outlet are intercommunicated with the chamber. The detection assembly is mounted in the chamber of the housing and includes a substrate, a detection unit, and a signal transmission port. The detection unit includes at least one specific gas detection port. A surface of the at least one specific gas detection port is covered with a polymer specific gas detection film that has an affinity for a specific gas. The signal transmission port is disposed on the substrate and is electrically connected to the detection unit. The data acquiring module is electrically connected to the signal transmission port of the detection assembly. Thus, a better balance between the production cost and the detection accuracy is achieved.
