Abstract: A drinking water warming and heating device, comprising a housing having a storage chamber inside thereof and a water circulating space set therebetween. Inside the space is a partition which divides the space into an inner and an outer water circulating space, and mounting plates connected perpendicularly on either side of the partition and extending between the housing and the chamber, the plates dividing the inner and outer water circulating spaces into vertical channels. The water circulating passage has one end connectable to the water outlet port of the engine of a motor vehicle and an opposite end connectable to the water tank of said motor vehicle permitting waste heat from engine cooling water to make heat exchange with drinking water in the water storage chamber. An electric heating element in the storage chamber is connected to the battery power supply of the motor vehicle to heat warmed-up drinking water to boil.