A VOD service method for reducing an occupancy rate of the CPU using an SSD, the VOD service method comprising: (a) setting a packet array area in the SSD where VOD packets to be transmitted are grouped in a unit of a predetermined number of packets and then temporarily stored, allocating a packet array according to a picture quality level of an image, a target transmission speed, a request ratio for the picture quality level, and the number of simultaneous requesters; (b) constructing a request index table containing an IP address of a requester client, a file name and a file storage address of a requested content of a VOD when the VOD is requested by the requester client; (c) reading the predetermined number of packets of the requested content from the file storage address within the SSD designated by the request index table according to a picture quality level of the VOD requested by the requester client, and loading the predetermined number of packets on the packet array; and (d) determining whether the packet array is full: (e) simultaneously transmitting all packets in the packet array by the CPU to a network interface connected to the requester client during a single session of the CPU by referring to the request index table when a storage space of the packet array is full, wherein the step (e) is performed if the VOD is requested by the requester client, and is not performed if the VOD is not requested by the requester client; and (f) deleting a corresponding request item from the request index table when transmission of the requested content of the VOD is completed, wherein said reading, said loading, and said transmitting of the packets reduces an occupancy rate of the CPU. (a) setting a packet array area in the SSD where VOD packets to be transmitted are grouped in a unit of a predetermined number of packets and then temporarily stored, allocating a packet array according to a picture quality level of an image, a target transmission speed, a request ratio for the picture quality level, and the number of simultaneous requesters; (b) constructing a request index table containing an IP address of a requester client, a file name and a file storage address of a requested content of a VOD when the VOD is requested by the requester client; (c) reading the predetermined number of packets of the requested content from the file storage address within the SSD designated by the request index table according to a picture quality level of the VOD requested by the requester client, and loading the predetermined number of packets on the packet array; and (d) determining whether the packet array is full: (e) simultaneously transmitting all packets in the packet array by the CPU to a network interface connected to the requester client during a single session of the CPU by referring to the request index table when a storage space of the packet array is full, wherein the step (e) is performed if the VOD is requested by the requester client, and is not performed if the VOD is not requested by the requester client; and (f) deleting a corresponding request item from the request index table when transmission of the requested content of the VOD is completed, <EOS>