Insurance is in the form of contract, on the basis of gathering many insured people threatened by the same risk. An economic compensation system in which the insurer collects premiums in advance according to the principle of loss sharing and organizes insurance funds to compensate the insured's losses in monetary form. Insurance is essentially a socialized arrangement. Insurers organize people who are at risk, so that personal risks can be transferred and dispersed, and insurers organize insurance funds to be borne centrally. When the insured suffers losses, he can get compensation from the insurance fund, that is, "everyone is for me and I am for everyone". It can be seen that the essence of insurance is a mutual aid behavior. From the perspective of economics, insurance is to transfer objective future risks. Turning uncertain losses into certain costs (premiums) is one of the effective means of risk management. Therefore, insurance is to transfer rather than avoid objective future risks.