The invention belongs to the technical field of virtual reality, and specifically relates to a package additional information interaction system and method based on a two-dimensional code. The system comprises a two-dimensional code generating unit, a password setting unit, an information management unit, a code scanning unit, a signing verification unit and an additional information management unit. The method comprises the steps of generating a two-dimensional code according to order information and a courier number, and taking a password set by a user as an extraction password of a URL (Uniform Resource Locator) web page associated with the two-dimensional code; when scanning the two-dimensional code added to a package, linking the URL web page associated with the two-dimensional code; displaying relevant information after the password is verified, and sending order receiving information according to the courier number. After the URL web page is associated to the two-dimensional code, the secondary password is verified, and information stored in the additional information management unit is displayed after the verification passes. According to the system and the method, the recipient signs the package by scanning the code with a mobile phone, so that the situation of fraudulent reception in the package mailing process, particularly when the package is signed by others is avoided.