[Abstract] Summary: It has been shown that static hemodynamic monitoring may not accurately reflect the volume status of circulation in patients undergoing surgery. Functional hemodynamic monitoring is a newly hemodynamic monitoring method and can actively and precisely predict fluid responsiveness. Purpose: This article reviews the applications and limitations of functional hemodynamic monitoring during clinical practice. Content: Functional hemodynamic monitoring, based on the princinple of heart-lung interaction during mechanical ventilation, is served as prediction of fluid responsiveness and evaluation of circulatory volume states. Functional hemodynamic indices,which reflect cyclic variations in stroke volume, can be devided into three categories according to different monitoring pricinples. The clinical application and limitation of these indices are discussed as follows. Trend: Functional hemodynamic monitoring can provide a more effective and more accurate assessment method of volume status for clinical doctors, its application prospects even brighter.