A safe nursing system includes a control unit and monitors movement of a patient on a bed. The control unit sets, for each patient, a correspondence relationship between a plurality of types of predetermined movements and a plurality of alert levels based on conditions calculates a value of a predetermined index used to determine a predetermined movement of the patient sets a predetermined condition to determine the predetermined movement determines the predetermined movement based on the calculated value and the set predetermined condition and outputs information indicating that the patient has performed the predetermined movement at the alert level indicated by the correspondence relationship set for the patient in accordance with the predetermined movement, under the condition that the predetermined movement has been determined to have been performed. It is possible to give a notification to a caregiver based on the condition of each patient.