To provide a mobile communication terminal test device and a mobile communication terminal test method capable of displaying the theoretical value of a packet transmission rate. A mobile communication terminal test device 1 includes a pseudo base station device 10 that is connected between a mobile communication terminal 5, which is a test target, and a virtual connection device 20, a table storage device 30 that stores various tables, a parameter input unit 50 that inputs information about TM, MCS, and NRB, a TBS acquiring unit 41 that acquires TBS on the basis of the input information and various tables stored in the table storage device 30, a packet transmission rate calculating unit 43 that calculates the theoretical value of the packet transmission rate from TBS, and a display unit 93 that displays the theoretical value of the packet transmission rate.