An information processing apparatus includes: a supplied electric power value accepting unit accepting a supplied electric power value, which is a difference between an electric power value of microwaves incident on a microwave irradiation apparatus and an electric power value of microwaves reflected by the microwave irradiation apparatus; a temperature accepting unit; an electric energy calculating unit calculating an electric energy corresponding to a microwave irradiation time, using the supplied electric power value; a temperature change calculating unit calculating a temperature change corresponding to the microwave irradiation time, using the accepted temperature; a judging unit, using the electric energy, the temperature change, and a relational expression for associating the electric energy and the temperature change, judging whether the relational expression is satisfied within a tolerable range; and an output unit outputting occurrence of an abnormality, when it is judged that the relational expression is not satisfied within the tolerable range.