A structural health monitoring system comprising a structure including an assembled body and a plurality of structural materials, the plurality of structural materials forming the assembled body and each comprising joint portions and a shaft portion, wherein at least part of surfaces of the joint portions and at least part of surfaces of the shaft portion are conductive such that, by surfaces of the plurality of structural materials being electrically connected, electrical paths are formed in the assembled body that forms frames of a three-dimensional building assembled by joining the plurality of structural materials through the joint portions, wherein the system further comprises a structural health monitoring apparatus comprising: a resistance measurement unit configured to measure a resistance value between one terminal and another terminal of a set of two terminals, the set of two terminals provided on the electrical paths of the surfaces of the structural materials and being selected from a plurality of terminals provided on the electrical paths, the resistance value being a combined resistance value of all electrical paths from the one terminal to the other terminal of the set of two terminals; and an evaluation unit configured to evaluate the health of the structure by using a difference between the resistance value between terminals of the set of two terminals measured by the resistance measurement unit and a reference resistance value between terminals of the set of two terminals, and configured to output evaluation result information, wherein among electrical paths between two terminals provided on a same structural material, a shortest electrical path shorter than a predetermined distance is provided with an insulating portion and is electrically opened; and the structural health monitoring system, further comprising: a switch for short-circuiting the shortest electrical path between two terminals across the insulating portion; and a terminal selection unit configured to select a plurality of sets of two terminals from the plurality of terminals, and control each switch to open a switch corresponding to a set to be measured and to short-circuit a switch corresponding to a set not to be measured. a resistance measurement unit configured to measure a resistance value between one terminal and another terminal of a set of two terminals, the set of two terminals provided on the electrical paths of the surfaces of the structural materials and being selected from a plurality of terminals provided on the electrical paths, the resistance value being a combined resistance value of all electrical paths from the one terminal to the other terminal of the set of two terminals; and an evaluation unit configured to evaluate the health of the structure by using a difference between the resistance value between terminals of the set of two terminals measured by the resistance measurement unit and a reference resistance value between terminals of the set of two terminals, and configured to output evaluation result information, wherein among electrical paths between two terminals provided on a same structural material, a shortest electrical path shorter than a predetermined distance is provided with an insulating portion and is electrically opened; and the structural health monitoring system, further comprising: a switch for short-circuiting the shortest electrical path between two terminals across the insulating portion; and a terminal selection unit configured to select a plurality of sets of two terminals from the plurality of terminals, and control each switch to open a switch corresponding to a set to be measured and to short-circuit a switch corresponding to a set not to be measured. a switch for short-circuiting the shortest electrical path between two terminals across the insulating portion; and a terminal selection unit configured to select a plurality of sets of two terminals from the plurality of terminals, and control each switch to open a switch corresponding to a set to be measured and to short-circuit a switch corresponding to a set not to be measured.