Abstract: Provided are an Internet phone service system and method by using softphone created by users. The Internet phone service system includes: a service system creating a softphone created by users based on information input through a webpage and connecting calls made over the Internet by using the softphone created by users; a creator requesting the creation of the softphone created by users by inputting the information to the service system and, after the softphone created by users is created, downloading the softphone created by users in the form of an execution file or inserting a universal resource locator (URL) code into a webpage as a link to the softphone created by users; a user using the softphone created by users in the form of the execution file in a personal computer (PC) environment or clicking on the URL code, which is inserted into the webpage, to make phone calls over the Internet.