Abstract: In the period of historic intersection of energy revolution, a new round of technological revolution and industrial transformation, unprecedented opportunities and challenges are appearing in the development of urban gas industry. Herein, the development history of urban gas industry was reviewed briefly, four major development trends of industry future were analyzed and summarized, and the pain spots of the industry were pointed out, including the insufficient industry intelligence, the incomplete safety system and the inadequate depth of low-carbon energy transformation layout. In addition, an overall logical block diagram was constructed based on the key technologies of intelligent gas. Meanwhile, the key problems in the construction of perception layer, transmission layer and application layer were analyzed. Moreover, focusing on the key technologies of gas safety, the concept of building a safety management system of urban gas based on integrity management was proposed, coring at the establishment of a digital model for the gas transportation and distribution system and the construction of a failure database. Furthermore, the development approach for constructing a "near-zero carbon"energy ecological network of urban gas was put forward based on gas decarbonisation. Finally, the economic and safety problems faced by the technologies such as efficient utilization of natural gas and hydrogen mixing in natural gas pipelines were emphatically analyzed, and accordingly, appreciate solutions were developed.