In the process of coal seam recovery in most mine of Yangquan mining area, large mine gas emission overtops gas in No.15 current seam. PNN logging is an effective method of gas zone recognition which extracts stratum macroscopic capture cross section through using measured formation of residual thermal relationship changing over time and ratio of neutron counting getting from two neutron detectors. PNN logging technology is applied to log coal bed methane well in Yangquan mining area and identify gas-bearing bed processed by perforation and fracturing. Result of drainage in later period shows that PNN logging technology makes a difference in gas-source strata identification.