The invention discloses a liver health reminding system and a work method thereof. With the liver health reminding system and the work method thereof adopted, a user can know the health of his or herliver. According to the technical schemes of the invention, the liver health reminding system comprises a reminding device, a memory, a first sensor, a second sensor, a comparison unit, and a controller; the memory stores a data comparison table, wherein the data comparison table includes the physical parameter data of the liver of a user under different motion states; the first sensor is suitablefor detecting the current motion state of the user to obtain motion state data; the second sensor is suitable for detecting the physical parameters of the liver of the user under the current state soas to obtain actual data; the comparison unit is suitable for comparing the data detected by the first sensor and the second sensor with data in the data comparison table; and when the motion state data are corresponding to a motion state in the data comparison table, the controller is used for controlling the reminding device to work if the actual data are inferior to the physical parameter datacorresponding to the motion state.