To provide such equipment which can dispose the documents, more particularly highly confidential documents emitted from government offices, schools, offices, hospitals, etc., as simply as possible.

This paper sheets decomposition treatment equipment is equipped with a decay vessel into which at least paper sheets are put and which decays the paper sheets, an agitator which agitates the paper sheets in the decay vessel, a humidifier which humidifies the inside of the decay vessel, a humidity controller which measures the humidity in the decay vessel and controls the humidification by the humidifier, a heating and cooling device which heats or cools the inside of the decay vessel and a temperature controller which measures the temperature in the decay vessel and controls the heating or cooling by the heating and cooling device.