Hierarchical Cu(OH) 2 /Co 2 (OH) 2 CO 3 nanohybrid arrays grown on copper foam were realized by a simple two-step solution route for the first time, Cu(OH) 2 nanowires were utilized as a scaffold to form Cu(OH) 2 nanowire/Co 2 (OH) 2 CO 3 nanoneedle core–shell structures and upper dispersed Co 2 (OH) 2 CO 3 ball-flowers structures. And time gradient experiments were also considered to understand the growth mechanism for the Cu(OH) 2 /Co 2 (OH) 2 CO 3 nanohybrid arrays, the optimized hierarchical architecture electrode of Cu(OH) 2 /Co 2 (OH) 2 CO 3 yields a high areal capacitance of 1.31 F cm −2 at 2 mA cm −2 , which is more than three times higher than that of single Cu(OH) 2 electrode (0.37 F cm −2 ) and also superior than that of Co 2 (OH) 2 CO 3 , an excellent rate property (0.74 F cm −2 at 50 mA cm −2 ), and good cycling stability (91.5% capacity retention after 5000 cycles). Also, the hierarchical Cu(OH) 2 /Co 2 (OH) 2 CO 3 nanohybrid arrays//active carbon asymmetric supercapacitors (ASCs) were fabricated, exhibiting a high energy density of 656 mWh cm −2 with a power density of 28.8 W cm −2 . And three different colors (two red, two yellow, two green) of LED indicators can be lighted up by two ASC devices in series, which demonstrate that the hierarchical Cu(OH) 2 /Co 2 (OH) 2 CO 3 nanohybrid arrays on copper foam are promising candidate electrode materials for supercapacitors.