A commodity delivery and microwave system for a popcorn vending machine includes: a storage rack, adapted to mount popcorn kernel packages, an opening configured on a lower side of the storage rack, the opening allowing the popcorn kernel package to be moved out therethrough; a delivering device, configured below the storage rack, and adapted to push the popcorn kernel package out of the storage rack and send the popcorn kernel package into a microwave heating device; and the microwave heating device, configured beside the storage rack and including a support bracket, the support bracket configured with a microwave heater having a side door corresponding to storage rack and an open bottom, a door opening and closing device configured on the microwave heater and adapted to open or close the side door, a lower cover plate coupled pivotally to the support bracket.