Disclosed is a drinking water reminding system and the reminding method thereof. The water intake of user is measured by the operation of a reminder of the drinking water reminding system, and a collector of the drinking water reminding system is provided for adjusting the daily drinking water demand of user according to environmental parameters or the physiological parameters of user. The drinking water reminding system reminds the user to drink water if the drinking water reminding system determines that the user has taken insufficient water according to predetermined conditions and measurement results, drinking water reminding system.
