Due to urbanization increasing, the quantity of solidwastes inBeijing is increasing rapidly and leads to large numbers of informal solid wastes dumps. Solid wastes in these sites are usually dumped in the open air without certain environmental conservationmeasures, which influence the urban environment and human healthy badly.It is absolutely necessary tomonitor these dumps in order to take some effectivemeasurements to dispose them. Remote sensing technology can provide a rapid and effective way to identify and monitor the dumps, owning to its characteristics of objectivity, real-time and macro-scope view.With high spatial resolution, high frequency of revisiting and broad coverage range, Beijing-1M icrosatellite image is an importantdata source forurban environmentmonitoring. Taking the flatplain area ofBeijing as study site, this paper establishes the interpretation keys of informalopen-air solidwaste dumps through studying theircharacteristics based onBeijing-1fusion images. Via visual interpretation and automatic change detectionmethods, the authors studies the location and change of the open-air solidwaste dumps. Compared with the field investigation data, it shows high accuracy (about90.3% ) of the indoor visual interpretation result using Beijing-1 images. However, on accountof the uncertainty of the solidwaste dumps characteristics, automatic change detectionmethod can just be utilized to decrease thework ofvisual interpretation to find the location instead of replacing itcompletely.