information and other personal information. Privacy issue Digital marketing is considered a challenge for privacy because consumers' information is searched, collected, and used in the process of digital marketing without consumers' awareness. The privacy of customers is important because that it is related to customers' perceived value, satisfaction, loyalty, their trust in a company and the performance of a company. Types of information Basic information： In the traditional sense, private information mainly includes gender, age, educational background, marital status and other basic information. In the network society, private information also includes personalized digital information such as account passwords. Activity information： Private information refers to browsing history, purchasing records, location, social activities and so on Illegal use of information At present, the discussion on the consequences of privacy issues caused by digital marketing technology is increasingly focused on the possibility of illegal use of information. The information of consumers may become commodities, which will be exchanged or traded without the consumer's awareness and authorization. The consumers' information is mainly exchanged or transacted in two forms. One is that the related merchants share those data. The other is that those data are sold by certain recommenders to a third party. For example, the data that can identify the financial status of consumers is very attractive to credit agencies. All of these above increases the risk of consumer privacy. Customer attitude Some customers tend to choose the latter between a right to privacy and other favourable conditions. Pieces of evidence show that some customers are willing to allow merchants to use their personal information if they can have something to gain in return, even just small rewards, even though they do worry about their privacy may be invaded. In addition, digital marketing provide convenience to people. In the minds of some customers, this convenience is more important than their privacy, especially for teens. Nevertheless, most people are very concerned about whether their privacy is protected. Supervision and administration Permission marketing seems to be a good way to solve legal issues and privacy issues. It provides a suitable way to let merchants could connect with customers. Consumers can grant licenses only to a few merchants which are chosen from a large number of merchants. Permission marketing aims to make digital marketing matches the request of the law and provide consumers with information autonomy and. The other solution is that merchants post privacy logs to