To synthesize and compose a material having a featured effect by using two or more sets of electrodes including the electrode more made of different two or more kinds of elements or a composite material, controlling a discharge gap in a micron order and arbitrarily controlling a power intensity as well as a discharge time to a specified value or above.

By precisely controlling an energy for discharge generation with a semi-conductor switch and controlling a time to control an energy intensity to ≥105 W/cm2, a pressure and a temp. to cause reaction are obtained based on various properties of a thermal conductivity, etc., of elements, further, by estimating a reaction time, discharging is generated. a discharge gap, a position diffusion depth and, etc., are precisely controlled with NC and a discharge time, in the case of a diffusion medium, by controlling a pressure to control an average free stroke, an electrode having shape smaller than an objective shape dimension subjected to diffusion working is used. In particular, in the case of many elements composite, powder or granular alloy, etc., containing many elements is used.