Abstract: A method for evaluating inhalation administration and a system for evaluating inhalation administration, the system including a flow detector and an intelligent terminal. The method includes the following steps: 1) obtaining patient-related data of an inspiration flow-time curve; 2) according to an inspiration flow parameter of inhalation administration, obtaining a start time and an end time of each effective inspiration flow section on the inspiration flow-time curve; and 3) calculating an effective inspiration volume Veffective based on the inspiration flow-time curve and a series of time parameters ti1 and ti2 obtained. The method for evaluating inhalation administration and the system for evaluating inhalation administration provide a basis for medical workers to select an appropriate inhalation administration device for patients.