The invention discloses an ordering system and method based on Internet. The system comprises an ordering server, a kitchen terminal, a cashier terminal and an ordering terminal. The ordering terminal is connected with the kitchen terminal, the cashier terminal and the ordering terminal. The ordering server comprises a vegetable database, a registering and login module, a dining table booking module, a bill management module and a distribution module. Names, prices and brief introductions of vegetables are stored in the vegetable database, the registering and login module is used for an ordering user to conduct registration when visiting the Internet first and log in when visiting the Internet second, the dining table booking module is used for determining a proper table according to the number of dining people selected by the user and feeding back the dining table number of the user, the bill management module is used for settling accounts according to vegetables of a customer, and the distribution module is used for conducting distribution and receiving confirmation of takeaway service orders. The ordering system combines of on-site ordering, Internet booking and online purchase of takeaway, manages takeaway distribution, conducts comprehensive management through the ordering server and avoids order repeating and order errors.