Mobile sensitivity content reproduction method and player applying same

Provided is a mobile sensitivity content reproduction method comprising: a step of acquiring PPG information of a user by using an optical sensor provided in a mobile device; a step of determining a relaxed state or an alert state by determining the user's sensitivity from the PPG information; an image conversion step of increasing the chroma and the brightness of image content when the user's sensitivity state is the relaxed state, or decreasing the chroma and the brightness of image content when the user's sensitivity state is the alert state; and a step of presenting, to the user, the image content having passed through the image conversion step through a display of the mobile device so as to induce the user's sensitivity from the relaxed state into the alert state or from the alert state to the relaxed state.