A meteorological radar system and a method and device for processing meteorological information which can detect a rain cloud and detect an upward movement of the detected rain cloud in the sky, at low cost and short time are provided. A rain cloud detecting module 23 detects a location and three-dimensional velocity of a rain cloud based on signals from at least three radars of first to third radars disposed at different locations. A rain cloud characteristic detecting module 26 detects a characteristic of the detected rain cloud based on signals from either a radar being different from the three radars, or one of the three radars.