To realize appearance of optical element using electro-optical materials that makes a change in control output of light difficult regardless of changes of conditions including a repetition frequency of control signal supplied externally.

In a control method of optical element including optical components that are made of electro-optical materials having electro-optical effects, a control method of optical element in which the electro-optical materials are made to run within a temperature range showing paraelectricity including a ferroelectric phase transition temperature, and an optical element including temperature control means are provided.