Abstract: A cloud service system and method for unloading and loading plans are disclosed. The system includes a server and planners. An integrated unloading plan providing method includes the operation: (a) assigning, by each planner, a ship company, a sea route, and a ship for an unloading plan; (b) specifying, by each planner, edition attributes in consideration of the attributes of cargo to be loaded; (c) performing, by each planner, display for each cell of a bay profile on the basis of the previously specified cargo attributes; (d) when there is a need to input detailed information for each cell of the bay profile, inputting, by each planner, the detailed information; (e) when there is a need for inboard transloading during an operation for each cell, assigning, by each planner, a transloading plan to a corresponding cell; and (f) determining, by each planner, whether planning for each cell has been completed.