To provide a temperature control device and a temperature control system which enable a symbol member which is the symbol of a specified person, such as a memorial tablet, to allow a person holding the member to feel not coldness but the warmth of the specified person.

This temperature control device includes a symbol member 2 formed in the shape of a memorial tablet, a temperature detection means for detecting the current temperature of the symbol member 2, a heating means of heating the symbol member 2, and a temperature control means 4 for controlling the heating of the heating means according to a temperature detection signal from the temperature detection means and temperature data about the body temperature of the deceased. The temperature detection means and the heating means are integrally incorporated into the symbol member 2 taking the form of a memorial tablet.