This invention discloses a container assembly of pallet structure with portable parts, including one or more side board unit, one or more corner connectors, one or more supporting pallets, and one or more laying boards. The side board unit further includes a side board and a bottom board. The side board has stop-by-contact section extends from each of side of the side board to engage with the groove of a corner connector. The bottom of the side board engages with the pallet to form a unit, while allowing laying boards to be installed within.