Developing cost-effective and highly efficient transition metal-based electrocatalysts for overall water splitting is a promising strategy for achieving large-scale and renewable hydrogen energy. In this study, NiMoO4 (NMO) flowerlike microspheres were firstly grown on polyester (PET) textiles by simple hydrothermal reaction, then Ni/Ni(OH)2-NNMO and NiOOH/NMO electrocatalysts for hydrogen evolution reaction (HER) as well as oxygen evolution reaction (OER) were subsequently fabricated on NiMoO4 substrates, respectively. The Ni/Ni(OH)2-NNMO was facilely obtained through electrodeposition on NMO surface, and showed an overpotential of 52 mV at 10 mA cm?2 for HER. Simultaneously, the NiOOH/NMO was directly derived from surface oxidation reconstruction of NMO, and an overpotential of 228 mV at 10 mA cm?2 was observed for OER. An efficient water-splitting system was finally constructed based on Ni/Ni(OH)2-NNMO and NiOOH/NMO electrodes with low cell voltage of 1.56 V at a current density of 10 mA cm?2 and exceptional stability.