With the use of historical data from their 1982-1985 special observation at the source area of the Taiwan Warm Current the authors conducted studies to clarify the temperature and salinity characteristics, variability, and origin of the Taiwan warm Current Water, and its influence on the expanding direction of the Changjiang Diluted Water.The main results are given below.(1)The Taiwan Warm Current Water can be divided into the “Surface Water of the Taiwan Warm Current” formed due to the mixing of the Kuroshio Surface Water flowing northward along the east coast of Taiwan with the Taiwan Strait Water, and the “Deep Water of the Taiwan Warm Current” originated from Kuroshio Subsurface Water to the east of Taiwan. It is characterized by stable low temperature and stable high salinity in summer. The maximum seasonal variation and maximum secular variation of temperature and salinity are 1.87℃, 0.26‰ and 2.96℃, 0.37‰, respectively.(2)The variation in strength of the Taiwan Warm Current is the main influe With the use of historical data from their 1982-1985 special observation at the source area of ​​the Taiwan Warm Current the authors conventional studies to clarify the temperature and salinity characteristics, variability, and origin of the Taiwan warm Current Water, and its influence on the expanding direction of the Changjiang Diluted Water.The main results are given below. (1) The Taiwan Warm Current Water can be divided into the “Surface Water of the Taiwan Warm Current” formed due to the mixing of the Kuroshio Surface Water flowing northward along the east coast of Taiwan with the Taiwan Strait Water, and the “Deep Water of the Taiwan Warm Current” originated from Kuroshio Subsurface Water to the east of Taiwan. It is characterized by stable low temperature and stable high salinity in summer . The maximum temperature variation and maximum secular variation of temperature and salinity are 1.87 ℃, 0.26 ‰ and 2.96 ℃, 0.37 ‰, respectively. (2) The variation in strength of the Taiwan Warm Current is the main influe