A business management system comprising: an analyzing means for analyzing an image to detect an iris of a user; a position determining means for determining whether a position of the iris of the user in the image is within a correspondent screen region corresponding to a display screen, on which an application screen is displayed, when the iris of the user is detected; a viewpoint coordinate calculating means for calculating a viewpoint coordinate indicating a viewpoint of the user on the display screen based on the position of the iris of the user when the position of the iris of the user is within the correspondent screen region; an application identifying means for using coordinate information of the application screen being displayed on the display screen and the viewpoint coordinate to identify an application providing an application screen viewed by the user; an application determining means for determining whether the identified application is a predetermined application to be used in a business; a time calculating means for calculating a usage time of an application determined to be the predetermined application when the identified application is determined to be the predetermined application; and a browsing determining means for determining whether the user views a screen of the identified application in a past specific period with reference to a generation date and time of the image when the iris of the user is not detected, wherein the application determining means determines whether the identified application is the predetermined application when it is determined that the user views a screen of the identified application in the past specific period, and the time calculating means adds a period, in which no iris of the user is detected, to a usage time of an application determined to be the predetermined application when it is determined that the identified application is the predetermined application. an analyzing means for analyzing an image to detect an iris of a user; a position determining means for determining whether a position of the iris of the user in the image is within a correspondent screen region corresponding to a display screen, on which an application screen is displayed, when the iris of the user is detected; a viewpoint coordinate calculating means for calculating a viewpoint coordinate indicating a viewpoint of the user on the display screen based on the position of the iris of the user when the position of the iris of the user is within the correspondent screen region; an application identifying means for using coordinate information of the application screen being displayed on the display screen and the viewpoint coordinate to identify an application providing an application screen viewed by the user; an application determining means for determining whether the identified application is a predetermined application to be used in a business; a time calculating means for calculating a usage time of an application determined to be the predetermined application when the identified application is determined to be the predetermined application; and a browsing determining means for determining whether the user views a screen of the identified application in a past specific period with reference to a generation date and time of the image when the iris of the user is not detected, wherein the application determining means determines whether the identified application is the predetermined application when it is determined that the user views a screen of the identified application in the past specific period, and the time calculating means adds a period, in which no iris of the user is detected, to a usage time of an application determined to be the predetermined application when it is determined that the identified application is the predetermined application.