Abstract: A system, a wearable device and method for monitoring hand actions. The method comprises: obtaining a visual input from a sensor located on the wearable device worn by a subject. The sensor is configured to capture at least an interior portion of a hand of the subject. The method further comprises identifying, based on the visual input, an object and an action performed by the hand of the subject with respect to an object. The method further comprises performing a responsive action based on at least one of the action and the object. The wearable device is configured to be utilized for self-service shopping, manual fulfillment of a shopping order of a customer, mapping locations of items, detecting violation of safety rules, monitoring health-care systems, managing labs or manufacturing plant, or for other applications related to hand actions monitoring.