The　quantum　anomalous　Hall　effect　(QAHE)　in　intrinsic　ferromagnets　has　attracted　considerable　attention　recently.　Previously,　studies　of　the　QAHE　have　mostly　focused　on　the　default　assumption　of　out-of-plane　magnetization.　In　fact,　the　QAHE　can　also　be　achieved　via　in-plane　magnetization,　but　such　candidate　materials　are　very　scarce.　Here,　we　find　that　two-dimensional　(2D)　YN2　not　only　possesses　the　previously　reported　out-of-plane　QAHE,　but　it　also　possesses　a　tunable　in-plane　QAHE.　More　importantly,　unlike　the　previously　reported　in-plane　QAHE　in　d/f-type　ferromagnets,　here　we　report　the　effect　in　a　2D　d　ferromagnet,　namely　YN2,　for　the　first　time.　In　the　ground　state,　a　YN2　monolayer　has　a　half-metal　band　structure,　and　manifests　six　pairs　of　fully　spin-polarized　Weyl　points　at　the　Fermi　level.　When　spin-orbit　coupling　is　included,　the　YN2　monolayer　can　realize　multiple　topological　phases,　determined　based　on　the　magnetization　direction.　Under　in-plane　magnetization,　the　YN2　monolayer　shows　either　the　Weyl　state　or　in-plane　QAHE　state.　Remarkably,　the　Chern　number　(±1)　and　the　propagating　direction　of　QAHE　edge　channels　can　be　continuously　switched　via　shifting　the　direction　of　the　in-plane　magnetic　field.　When　magnetization　is　applied　out-of-plane,　the　YN2　monolayer　realizes　an　out-of-plane　QAHE　phase　with　a　high　Chern　number　of　3.　The　nontrivial　edge　states　for　all　the　topological　phases　in　the　YN2　monolayer　have　been　clearly　identified.　This　work　suggests　that　2D　YN2　is　an　excellent　candidate　for　investigating　in-plane　QAHE　phases　in　d　ferromagnets.　This　journal　is　©　The　Royal　Society　of　Chemistry.