Abstract. From the perspective of urban design, this paper investigates and records the soundscape in city blocks in the use of literature research, acoustic measurement, sound recording, soundscape walk, in-depth interview and other research methods. Based on data analysis, we use "place" concept and spatial analysis method for urban design, put forward to use "soundscape field" to refer to the field domain with integration of sound, sound object and sound environment over a period of time. We also propose to identify sound, sound object, sound environment and sound sustaining time as four elements of urban soundscape, and discuss the relationship among them.