TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The hydrogen purification apparatuses are equipped with a heat recycling medium to utilize waste gas e.g. hydrogen, carbon dioxide, etc. which were not recovered as product hydrogen, as a heat source of the hydrogen purification apparatuses after the hydrogen-containing process fluid was purified. It also comprises carbon-monoxide conversion devices which transform the carbon monoxide in the hydrogen-containing process fluid supplied from the excessive raw material recovery equipment. The hydrogen-containing process fluid supplied from the carbon-monoxide conversion device is purified and the hydrogen splitter which separates product hydrogen is provided. It is also equipped with a concentration adjustment medium to adjust the concentration of the hydrogen contained in the waste gas. The excessive raw material recovery equipment is a raw material heater which heats the supply raw material which makes a heat source exhaust heat of the hydrogen-containing process fluid by which it is generated in the hydrogen-producing apparatus and consists of oxygen containing hydrocarbon and pure water. The excessive raw material separation and-recovery apparatus which separate and recovers the oxygen containing hydrocarbon which is an unreacted excessive raw material included in the hydrogen-containing process fluid by which it is generated in the hydrogen-producing apparatus. It also has a cooling means to utilize the excessive raw material separated by the supply raw material supplied to the raw material heater and the excessive raw material separation-and-recovery apparatus as a cooling medium of the hydrogen-containing process fluid supplied from the hydrogen-producing apparatus. The apparatus further comprises a mixing medium by which the excessive raw material recovery equipment mixes the excessive raw material and the supply raw material. It also has a modifier which performs the steam reforming which used the oxygen containing hydrocarbon as the raw material, where the modifier is equipped with an intermediate loop which circulates the thermal medium from a heat-source apparatus as a heat transfer structure. The intermediate loop circulated the steam from a heat source apparatus as a thermal medium. The oxygen containing hydrocarbons are organic compounds, e.g. alcohol and ether. EXAMPLE - No example given.