A method for determining a blood pressure measurement state, using a device that is held in a hand of a user to whom a blood pressure meter is mounted. The method includes: obtaining (i) image data including a face of the user by a camera that the device has, (ii) first information indicating an inclination angle of the determining device as to the gravitational direction, by an angle sensor that the device has, and (iii) second information indicating a position of the face of the user in the image data, and the proportion of the size of the face of the user in the image data; determining whether or not the user is correctly using the blood pressure meter based on the image data, the first information and the second information; and providing a notification indicating the determination result.