NOVELTY - A heating method of a heating apparatus (100) comprising at least one fuel cell (102), at least one power storage device (104), at least one heat-electricity conversion element (106), and a switching unit (101), involves: a first heating process in which the fuel cell charges the power storage device and generates heat during a charging process; and a second heating process in which the power storage device supplies electricity to the heat-electricity conversion element and the heat-electricity conversion element generates heat.    USE - For heating apparatus (claimed).    ADVANTAGE - The heating process can supply heat stably as long as the fuel of the fuel cell has not been completely consumed. The heating process not only generates heat through consumption of electricity but also generates heat at the time of generating and storing electricity, because of that heat may be constantly output to the external environment for a long time.    DETAILED DESCRIPTION - A heating method of a heating apparatus (100), where the heating apparatus comprises: at least one fuel cell (102), at least one power storage device (104), at least one heat-electricity conversion element (106), and a switching unit (101), where the fuel cell is adapted for charging the power storage device, the storage device is adapted for supplying electricity to the heat-electricity conversion element, and the switching unit is adapted for switching the heating apparatus between a first mode and a second mode, where the heating method involves: a first heating process in which the fuel cell charges the power storage device and generates heat during a charging process; and a second heating process in which the power storage device supplies electricity to the heat-electricity conversion element and the heat-electricity conversion element generates heat, where the first heating process and the second heating process are performed alternatively when the heating apparatus is switched to the first mode, and the first heating process and the second heating process are performed simultaneously when the heating apparatus is switched to the second mode.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of a heating apparatus.    Apparatus (100)    Switching unit (101)    Fuel cell (102)    Power storage device (104)    Heat-electricity conversion element (106)