In this paper, we first discuss some properties of the Galois linear maps. We provide some equivalent conditions for Hopf algebras and Hopf (co)quasigroups as its applications. Then let $H$ be a Hopf quasigroup with bijective antipode and $G$ be the set of all Hopf quasigroup automorphisms of $H$. We introduce a new category $\mathscr{ C}_{ H}(\alpha,\beta)$ with $\alpha,\beta\in G$ over $H$ and construct a new braided $\pi$-category $\mathscr{ C}(H)$ with all the categories $\mathscr{ C}_{ H}(\alpha,\beta)$ as components.
Categories: math.QA