Food safety (food safety) means that food is non-toxic and harmless, meets the required nutritional requirements, and does not cause any acute, subacute or chronic harm to human health. According to the definition of food safety by Beno, food safety is "a public health issue related to the impact of toxic and harmful substances in food on human health." Food safety is also an interdisciplinary field that specializes in ensuring food hygiene and food safety, reducing disease risks, and preventing food poisoning during food processing, storage, and sales, so food safety is very important.

The planting, breeding, processing, packaging, storage, transportation, sales, consumption and other activities of food (food) comply with national mandatory standards and requirements, and there are no toxic or harmful substances that may damage or threaten human health and can easily cause Hidden dangers that could cause the consumer to die of illness or endanger the consumer and his or her descendants. This concept shows that food safety includes both production safety and operation safety; both result safety and process safety; and both actual safety and future safety.

Safety means no threat, no danger, no harm, no loss. The harmonious coexistence of human beings as a whole and the living environment resources, without harming each other, with no hidden dangers of danger or harm, is a state in which unacceptable risks of damage are eliminated. Safety is a state in which the damage that the operating status of the system may cause to human life, property, and the environment is controlled below the level acceptable to humans during the human production process.

China’s current national security concept: 11 types including political security, homeland security, military security, economic security, cultural security, social security, scientific and technological security, information security, ecological security, resource security, and nuclear security. .

The absence of danger is a unique attribute of safety, so it can be said that safety is a state without danger.

Safety is a state without danger, and this state is independent of human subjective will, so it is objective. Neither the safety subject itself nor the bystanders of the safety subject can truly change the subject's security status just because of different feelings or understandings of the safety subject. A person who is already in a state of free fall will not be truly safe just because he feels good about himself; a person who is lying on a big solid bed in a solid building and is really not in any danger will not be truly safe just because he thinks he is in danger. are in danger. Therefore, safety is not only a state without danger, but also this state is objective and does not depend on people's subjective will.

As an objective state, the absence of danger is not a physical existence, but an attribute, so it must be attached to a certain entity. When security is attached to people, it is "human security"; when security is attached to the country, it is "national security"; and when security is attached to the world, it is "world security". Such entities that carry security, that is, the entities on which security depends, can be said to be the subjects of security. The objective security state must depend on a certain subject. When defining the concept of "security", it is necessary to reflect the fact that security is an attribute rather than an entity.