The present invention relates to a time and attendance management device, system and method, and receives a user's work, leave, or cancellation signal through one button, and goes to work, leaves, or a button input receiving unit for discriminating whether it is a cancel signal; a GPS module for receiving the location information of the device when the signal is received; and a wireless communication unit for transmitting the ID of the user, the divided signal, the time at which the signal is received, and the received location information to a server. According to the present invention, by providing a portable device capable of managing commuting with a single button, a system including the device, and a method for commuting management using the system, it is possible to conveniently manage commuting even when away from work. can have an effect.
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