In the development of next-generation secondary batteries, the aqueous zinc-based secondary batteries show great potential in large-scale energy storage systems and military power applications due to their high safety and low-cost advantages. To date, various novel materials and detection technologies are developing actively. Herein, a lab-developed portable in situ/operando optical microscopy probing device is shown, which can quickly and directly visualize the morphology evolution of the electrode surface in the electrode reaction process to reveal the reaction mechanisms on electrode. Moreover, this developed technology can also be applied in new electrolyte strategy studies to promote the development of an advanced zinc secondary battery with high performance.