A cargo platform system which can be uncoupled from a vehicle frame and lowered to a ground surface using a self-contained jack system after the vehicle has been removed from beneath the platform. The cargo platform system may comprise a sub-frame having deck-rails for attachment to a vehicle frame, a platform having deck-rails for removably coupling to the sub-frame, and a jack system comprising a first jack, a second jack, a third jack, and a fourth jack removably attached to a left front corner, a right front corner, a left rear corner, and a right rear corner respectively. All four jacks of the jack system are in communication together such that extension and retraction of the jacks are simultaneous and electric motors atop each jack are removable for storage.