Disclosed is a schedule management service system which takes spatial movements into consideration and has a schedule recommendation function. According to the present disclosure, based on the movement method information input from a user terminal, appointment time information and appointment place information included in input schedule information, and the user's immediately preceding schedule and immediately subsequent schedule registered in a schedule information database, it is determined whether it is possible to move between schedules, and if not possible, a schedule conflict signal is transmitted to the user terminal.