The present application provides a package structure, a method for manufacturing the same, a method for detecting a package defect in the package structure, an OLED device, and a display apparatus. The package structure includes: a first cover plate and a second cover plate; a sealant disposed between the first cover plate and the second cover plate and configured to form a sealed space with the first cover plate and the second cover plate; a moisture detection portion located in the sealed space; a first electrode having one terminal connected to a portion of the moisture detection portion, and the other terminal extending beyond the sealed space; and a second electrode having one terminal connected to another portion of the moisture detection portion, and the other terminal extending beyond the sealed space.