To analyze the landscape pattern of Jilin City in 1980, 1995 and 2010, the number of patches, patch density, the largest patch index, perimeter-area fractal dimension, aggregation index and Shannon diversity index were used by employing ArcGIS, ENVI, Excel and FRAGSTATS platforms. The results showed that the number of patches, patch density, perimeter-area fractal dimension, and Shannon diversity index increased first and then decreased, aggregation index decreased first and then increased,and the largest patch index was increased during the past thirty years in Jilin City. The areas of forest and grassland landscape had been reduced during the whole term, the area of wetland had increased first but reduced afterwards, and the area of dry landscape had expanded. Under the background of climate changing in the Northeast China, the changing of landscape pattern should have a certain effect on the climate of Jilin City. In this area, temperature increased and rainfall decreased. This study provides a scientific basis for the regional landscape ecological evaluation, landscape planning and management. A good relationship was found between the changing of landscape pattern and the spatial distribution patterns of the temperature and rainfall of Jilin City.