中文摘要：

龙口市是典型的双中心型城市，本文利用卫星遥感数据，获取龙口市两个城市中心各时期的发展状况，对城市扩展状况进行对比分析。1988年龙口城区的面积为754．32hm^2，只比黄城城区面积（567．11hm^2）稍大；而到2004年时，龙口城区的面积已经达到1847．03hm^2，接近黄城城区面积（976．14hm^2）的两倍，说明龙口城区的城市扩展强度高于黄城城区。利用逐步回归法对社会经济数据进行分析，发现黄城城区扩展主要由人口，城市化水平，居民消费水平等所驱动，而龙口城区扩展则是受外贸出口影响更大。

英文摘要：

The Longkou city is a double center city. This article uses the satellite remote sensing data to gain the development condition of two centers in various years. Then compare the condition of the two centers. In 1988, the Longkou center have 754. 32hm^2 , is only slightly bigger than the Huangcheng center that is 567.11 hm^2. When to 2004, the Longkou center already achieved 1847.03 hm^2 , attains to two times of the Huangcheng center （976.14 hm^2）. This explained the urban expansion ibtensity of the Longkou center is higher than the Huangcheng center. The analysis of the social economy data by use of stepwise linear regression has carried out. The expansion of the Huangcheng center is mainly actuated by the population, the urbanized level and the inhabitant expends. But the Longkou center expansion is mainly influenced by the foreign trade exportation.