PROBLEM TO BE SOLVED : To provide an information transmission method and an information transmission device with improved convenience and efficiency of real estate dealings.SOLUTION : An information transmission method by a server device 102 includes the steps of : calculating an estimated selling price of a real estate on the basis of the real estate information received from a user terminal 110; and transmitting a condition sufficiency notification to the user terminal 110 when the estimated selling price satisfies prescribed conditions received from the user terminal 110.COPYRIGHT : (C)2015, JPO&INPIT