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|a "Smart growth" strategy as a new urban development theory originated from United States as a way against urban sprawl. However urban sprawl also threatens China's urban spatial expansion process on certain extent.In this researach, the issues come from spatial layout, and construction land structure is irrational in Lanzhou City,so the main purpose is to find an appropriate development trend for future development.The result should push forward an influence on introducing Smart growth into China planning system as well as assist Lanzhou City get a better development direction.A survey of developing urban growth model with raster analysis function under GIS software based on smart growth strategy to stimulate several visual scenarios. Noteworthy, as simple questionnaire contributes to ranking the relative principles in smart growth for measure the weight in each scenario and those scenarios emphasize economic efficiency, environmental preservation and social equity respectively.After a series of evaluation between different scenarios and general plan in 2020, the final output should select a scenario which either involves the implication of smart growth in urban spatial development to the actuality of Lanzhou city
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