The present invention relates to a diet management system and a control method thereof and, more specifically, to a diet management system and a control method thereof, capable of maximizing a diet effect for a short time since a wrist type diet management device calculates a fat burning rate according to a heart rate of a user by measuring the heart rate, displays the calculated fat burning rate in different colors, stores the measured heart rate and momentum of the user in a main server through a mobile communication terminal (smartphone), and transmits and stores a personal target value and a personal fat burning section, set through the mobile communication terminal and the main server transmits a result of analyzing the received data to the mobile communication terminal, and informs the user of a heart section, in which fat-burning progresses most actively during diet of the user, in order to allow the user to intuitionally determine a fat-burning degree. The diet management system includes the wrist type diet management device detecting a heart signal and a mobile signal, detecting a heart rate (HR) from the heart signal in order to detect the fat burning rate by comparing the heart rate to a pre-stored maximum heart rate, and displaying different colors according to the fat burning rate the mobile communication terminal transmitting the mobile signal and the heart signal, which are measurement data received from the wrist type diet management device, to the main server and transmitting the personal fat burning section, set by the user, to the main server and the main server receiving, storing, and analyzing the personal fat burning rate and the measured data from the mobile communication terminal.COPYRIGHT KIPO 2016본 발명은 다이어트 관리 시스템 및 그 제어방법에 관한 것으로, 보다 상세히는 손목형 다이어트관리 장치에서 사용자의 심박수를 측정하여 심박수에 따른 지방연소율을 구하고, 구하여진 지방연소율에 따라 서로 다른 색상으로 디스플레이하고, 측정된 사용자의 심박수 및 운동량은 이동통신단말(스마트폰)을 통해 메인서버로 저장하고, 이동통신단말을 통해 설정된 개인별 지방연소 구간 및 개인별 목표치도 메인서버로 전송, 저장되며, 메인서버는 수신된 데이터를
