The data of TBB has high temporal-special resolution. And it can describe how the heavy convective cloud generates, develops and dissipates, especially TBB can be used to determine the top height of convective cloud. Based on the hourly data of TBB obtained from CMA, the key areas for severe convective weather warning and the key indicator for now-casting of heavy convective system are found. In addition, the displaying system of TBB, which consists of the functions such as animation, statistics and point displaying, is set up.