Abstract: In recent ten years, Fujian Institute of Geology Survey and Research explores continually the mapping methods in the nonmarine volcanic terrain Fu'an and other three breadths 1∶50000-scale regional geological surveying item obtained important progression in mapping methods of volcanic terrain, which was developing “volcanic sequence-rock facies(lithology)” diplex mapping method into “volcanic construction-lithologic rock facies-volcanic sequence” triune mapping method in the volcanic terrain. We sum up the mapping method in order to improve the mapping quality in new round regional geological surveying together.