Abstract: Engineering geology and hydrogeology are closely related, interrelated and interacting. Groundwater is not only a part of rock and soil, but also directly affects the engineering characteristics of rock and soil and the environment of foundation engineering, and affects the stability and durability of buildings. Key words: engineering geology; Hydrogeology; Relationship 1. Overview of engineering geology Engineering geology is a science that investigates, studies and solves geological problems related to human activities and various engineering buildings. (3830 words left)