Jinmao tall building is one of hightest building in China with height of 420.5 m.For diagnosing the building＇s healthy status,in other words,its safety,the frequencies of vibration types and damping are obtained from the building vibration by the Auto-regressive and Moving Average Model,and the fequencies and damping before and after earthquake or typhoon,or existing for a long peroid are compared.The result shows that this method is well manipulated and used in healthy diagnosis and maintenance for tall buildings and big bridges.