Wetlands can decelerate climate warming and regulate local air temperature. Six automatic measuring instruments (HOBO-U23) are placed on the edge of Qixing wetland which is typical sector of Naoli river region. Three plots, forest-wetland, shrub-wetland and cropland-wetland interfaces, are selected. Daily mean temperatures of 3 interfaces are obtained separately. The 3 trendline fitting methods between daily mean temperature (dependent variable) and day (independent variable) for 3 interfaces are used to determine the different regulation modes of wetland on 3 adjacent landscapes. The maximum values in 3 functions of the interfaces are shrub-wetland (25.47 ℃) < forest-wetland (25.96 ℃) < cropland-wetland (26.17 ℃), indicating that cooling effect of wetland on shrub is highest, and the next is forest, cropland is the smallest in the hottest of one year. The minimum values in 3 functions are forest-wetland (-15.96℃) < cropland-wetland (-15.85℃) < shrub-wetland (-15.72℃), indicating that wetland regulation on adjacent landscapes by the barrier protection of the wetland plant in the coldest time. The ability of wetland regulation in summer half year is stronger than that in winter half year.