A process of making pickled rock oyster (Saccostrea cucullata) comprising the steps of: washing and removing sand and small bits of shell attached in the rock oyster meat using freshwater for three times, draining the rock oyster meat in 2 minutes, mixing said drained oyster with vinegar, salt, minced carrots and bell pepper, sugar, black pepper, onions and ginger in a mixing bowl and packing said rock oysters in a sterilized bottles.