An energy contained waste to energy process and system includes a waste treatment unit having a treatment chamber and including a pressurizing presser movably supported in the treatment chamber for pressing the energy contained waste in the treatment chamber until the air within the energy contained waste is squeezed out. A waste to energy conversion unit includes a conversion housing having a reaction chamber for receiving the energy contained waste from the treatment chamber, and a pyrolysis processor for pyrolysis processing the energy contained waste in the reaction chamber to decompose the energy contained waste into a fuel gas and powdered residue. An energy collection unit is communicated with the waste to energy conversion unit to collect the fuel gas and the powdered residue as an energy source for recycling use.