The present invention discloses a turning-over method for turning over the cooking material in a cooker, comprising: 1) making the cooker rotate around a rotation axis which is within the edge range of the cooker； and 2) generating an acceleration at an appropriate position or at an appropriate time to cause all or a part of the material inside the cooker to turn over. The present invention also discloses a turning-over device utilizing the above turning-over method, which comprises a cooker, a first motion mechanism and a driving mechanism which is an electric device, a magnetic device, an aerodynamic device, a hydraulic device, and/or a mechanic device. The first motion mechanism comprises a rotation axis lying within the edge of the cooker, and the driving mechanism drives the cooker to rotate around the rotation axis at variable speed.
