A container, that prevents an illegal operation and can be easily identified after being illegally operated, includes a bowl-shaped base and a cover selectively closing the bowl-shaped base, wherein a pre-broken structure is formed on the cover and the cover cannot be smoothly detached from the bowl-shaped base before the pre-broken structure being damaged. For the market, the salesperson easily confirms that the container has been illegally operated and the illegally operated container is replaced in time for providing fresh good to the consumers. For the consumers, the illegally operated containers can be easily confirmed and eliminated through choosing for preventing from buying unsafe or stale goods, particularly foods.