Layered　perovskites　with　Aurivillius　phase　have　drawn　tremendous　attention　recently,　owing　to　their　high　ferroelectric　Curie　temperatures,　large　spontaneous　polarization,　and　fatigue-free　and　environment-friendly　characteristics.　Bi2WO6　is　one　of　the　simplest　members　in　the　Aurivillius　family　with　superior　ferroelastic　and　photoelectrochemical　behaviors.　The　self-assembly　fabrication　of　its　nanoarchitectures　and　strategic　modulation　of　their　ferroelastic　switching　are　crucial　toward　highly　efficient　nanoscale　applications.　In　this　work,　Bi2WO6　nanobrick　arrays　were　epitaxially　grown　along　the　orthorhombic　direction　in　a　self-assembled　way.　Such　a　nanoscale　topology　supports　out-of-plane　and　in-plane　vectors　of　ferroelectric　polarizations,　enabling　a　perpendicular　voltage　manipulation　of　these　emerging　ferroelectric/elastic　domains.　Combining　the　scanning　probe　technique　and　transmission　electron　microscopy,　we　confirmed　the　in-plane　polarization　vectors　of　78.6　and　101.4　degrees　within　the　crystallographic　axes　of　the　nanobricks　with　respect　to　the　(110)　plane　of　the　substrate.　Thus,　this　work　provides　new　opportunities　for　ferroelectric/elastic　engineering　in　Bi2WO6　nanostructures　for　a　wide　range　of　applications,　such　as　sensing,　actuating,　and　catalysis.