Abstract: Based on the data of the historical geography, the analysis of stratigraphic section, the textual research of the place name and satellite photographic interpretation, the authors studied the formation and evolution of the ancient lakes on the south coast plain of Laizhou Bay where ever had three lakes: Judian Lake, Qingshuibo Lake and Biehua Lake. All the lakes formed 6000 years ago, evolved from the lagoons near estuary and experienced two periods, the golden age in the Middle Holocene and the shrinking age in the Late Holocene. The disappearance of the lakes resulted from the drying climate, the migration of river and the activity of human being. Among the three reasons, the migration of river is the main one.