The development of bifunctional, highly active electrocatalysts for an overall water splitting reaction remains a major challenge. Here, the sacrificial template-assisted transformation of cobalt hydroxide nanowire (Co(OH)(2) NW) into a metal-organic framework network (MOF) is conceived as a porous structure that provides extremely active and durable electrochemical energy conversion characteristics. After this, the 1D MOF modified Co NWs can be further transformed into a hybrid structure (MOF CoSeO3 NWs) by selenization. The self-template transformation strategy allows the interconnected porous conductive network to be exposed to abundant reactive sites and to improve electronic conductivity/structural integrity. Thus, the obtained catalyst established by electrocatalytic activity in the course of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in 1 M KOH solution requires overpotentials (ii) of 290 and 150 mV to achieve a current density of 50 and 10 mA cm(-2) for both OER and HER. Interestingly, as a full cell water electrolyzer (MOF CoSeO3 NWs (+) // MOF CoSeO3 NWs (-)), the MOF CoSeO3 NW's modified electrode exhibits an affordable cell voltage of 1.675 Vat a current density of 100 mA cm(-2). This work involves a viable and systematic strategy to prepare many other functional integrated MOFs that can be used for energy storage and conversion in multiple applications.