The invention discloses a fully-automatic test device for concrete forming-erosion-detection and a use method of the fully-automatic test device. The test device comprises a concrete forming curing layer, a concrete erosion test layer, a concrete imaging detection layer, a temperature and humidity regulation device and a data acquisition and power control system, wherein a concrete sample is subjected to pouring and early-age curing in the concrete forming curing layer, after a set age is reached, the sample is transferred into the concrete erosion test layer for chemical erosion by the devicethrough an internal drive mechanism, a detection object is selected automatically according to setting of a user and transferred to the concrete imaging detection layer in the erosion process, fully-automatic concrete erosion and detection test process is realized, and integration of concrete curing, erosion testing and 3D internal structure nondestructive testing is realized. The device is beneficial to automation and integration of indoor experiments in the field, and research in the basic theory of concrete durability is promoted.