The present invention provides a communication information acquisition creation system 50 used for evaluating a network switch 4 which includes multiple communication ports 41. The communication information acquisition creation system 50 acquires first communication information input to a first communication port and second communication information input to a second communication port, then acquires from the first and the second communication information time information 1011 which is the time when each information has been acquired, transmitting source information 1012 which shows each transmitting source, and destination information 1013 which shows each destination, stores the communication data in which each piece of the above-mentioned information corresponds with each other, creates communication information for evaluation to be input to the communication port 41 of the network switch 4 with reference to the stored communication information, and transmits the created communication information for evaluation to the communication ports 41 specified by the transmitting source information and the destination information in the order shown by the time information.