Abstract: Based on the landscape classification system, 3S technologies were used to reveal the recent 40 years' landscape pattern changes of the Yuehu Lagoon, Shandong Peninsula. The results show that the type and area of artificial landscapes have increased rapidly, and some of the natural landscapes been resumed from to artificial landscapes. In addition, the landscape patterns in the study area have changed remarkably. The fragmentation of landscape has significantly increased, the landscape structure become more complex, and as the preponderant types the connection between water and shoal been weakened. The main reason of landscape changes in the study area is the impact of human activities. However,even under the same human activities' condition, landscape types behaved different spatially with time.