A pressure cooking device (10, 100) for cooking food materials (80), comprising: a sealed cooking chamber (20) arranged to accommodate food materials (80)； a steam supplying unit (30, 130) arranged to supply steam to the sealed cooking chamber (20)； and a steam channel (40) arranged to interconnect the steam supplying unit (30, 130) and the sealed cooking chamber (20)； wherein the pressure cooking device (10, 100) further comprises a control unit (11) adapted to control the cooking process based on the liquid water content and/or the humidity in the sealed cooking chamber (20). By virtue of this invention, the liquid water content and/or the humidity in the sealed cooking chamber (20) could be adjusted conveniently.
