This talk will describe our recent observational results of the wind dynamics in the polar lower thermosphere/mesosphere obtained with EISCAT radars, MF radar, meteor radars, and sodium LIDAR in northern Scandinavia. The polar regions of the Earth's atmosphere hold keys to understanding of a variety of important process such as aurorae, the ozone hole, and global warming. In particular, it is of vital importance to understand more deeply the mesospheric and the lower thermospheric wind dynamics at high latitudes for further understanding of the Magnetosphere-Ionoshpere-Themorpshere coupling process as well as better understanding of atmospheric coupling process between the lower and the upper atmosphere on the earth. It is well known that tidal, gravity and planetary waves play important roles in the wind dynamics in the mesosphere and lower thermosphere (MLT) region, therefore knowledge of the those waves is a key to understand the wind dynamics in MLT region. In this talk, we will present following topic. (1) Mode change of the semidiurnal tide observed between 70 and 120 km in September 2005 at Tromsoe (69.6N, 19.2E). (2) Latitudinal variation of mean winds, tides, and Q2DW in the mesosphere in northern Scandinavia. (3) Temperature variations between 80 and 110 km observed with the new sodium LIDAR at Tromsoe.