Lang first took up the study of photography at age 13, and in 1928 became the first photojournalist in China. In the same year he founded the Chinese Photography Association, later established branches in Chongqing and Kunming during the war, and in 1948 revived the national organization under the name China Photography Association.
他在十三歲拿起相機學攝影，民國十七年成為我國第一位攝影記者，同年他發起成立「中華攝影社」，抗戰期間成立重慶攝影學會、昆明攝影學會，民國三十七年在大陸創辦「中國攝影學會」。