Nickel　hydroxide　(Ni(OH)(2))　thin　films　were　deposited　from　a　variety　of　solutions　with　different　pH　values　by　liquid　phase　deposition.　Continuous　Ni(OH)(2)　thin　films　were　obtained　within　the　pH　ranging　from　7.5　to　8.8.　The　nucleation　and　growth　process　of　Ni(OH)(2),　and　beta-Ni(OH)(2)　crystallization　were　used　to　discuss　the　influence　of　solution　pH　on　the　microstructures　of　the　Ni(OH)2　films.　The　thin　films　are　made　of　Ni(OH)(2)　nanorods　mainly　with　beta-Ni(OH)(2)　crystallinity　and　there　are　a　lot　of　open　pores　between　the　nanorods　in　the　Ni(OH)(2)　films.　The　dimensions　of　Ni(OH)(2)　nanorods　change　remarkably　with　the　pH　of　reactive　solutions.　When　solution＇s　pH　is　7.5,　the　length　of　nanorods　is　about　80nm　and　the　diameter　is　about　50nm.　When　solution＇s　pH　increases　to　7.8,　the　length　of　nanorods　increases　to　about　180nm　and　the　diameter　is　about　60nm.　When　solution＇s　pH　increases　to　8.0,　the　length　of　nanorods　sharply　increases　to　about　300mn　and　the　diameter　is　about　70nm.　However,　when　solution＇s　pH　increases　to　8.3,　the　length　of　nanorods　decreases　to　about　230nm　and　the　diameter　is　about　80mn.　When　solution＇s　pH　increases　to　8.8,　the　length　of　nanorods　sharply　decreases　to　about　110nm　and　the　diameter　is　about　55nm.