Abstract: Urban geology is a new-emerging discipline developed in the past twenty or thirty years. It is a marginal discipline engagin in the study of geological environments and conditions related to urban construction and engineering, as well as an applied discipline intimately associated with the production, daily life, life, property and safety of the people. The differences between-urban geology and traditional geology are as follows. 1. The scope of research consistently centres on the city seat and conti- nuously enlarges with the development of the city. 2. The targets of research usually depend upon the geological conditions within the limits of a city and the features of the city. 3. There are a great variety of problems that require solution; so it is necessary to use highly integrated means of research. The basic research content of urban geology is as follows. 1. research on basic geology; 2. research on environmental geology; 3. research on disaster geology （speaking in a broad sense, disaster geology also belongs to the field of environmental geology also belongs to the field of environmental geology, but in order to call attention, it is necessary to treat it as an independent subject）; 4. research on mineral deposits; 5. research on tourist geology （tourist geoseience）. To carry out 1:50,000-scale comprehensive urban geological surveys in a planned way is an early-stage job or preceding job of an urban construction project, and may provide basic geological data upon which the study of urban geology can be based.