The present invention relates to a web browser-based scraping system and method, the web browser-based scraping system including: a web browser which is installed in a client device and receives a scraping request from a user, and in which a user certificate for enabling a connection to a target server is stored; a scraping engine which receives the scraping request from the web browser; a relay server which generates a telegram that meets the requirements of the target server necessary for scraping; a plurality of security gateways which receive the scraping request and the telegram from the relay server, connect to the target server with an IP different from the IP of the relay server and perform scraping, deliver scraped data to the relay server, and have respectively different IPs; and a scraping management server (SMS) which manages the IPs and operation states of the plurality of security gateways. When operating, the security gateways transmit their own IP information and ready-for-use states to the scraping management server. Upon receiving the scraping request from the web browser, the relay server requests the IP of a security gateway from the scraping management server, and the scraping management server selects one of the plurality of security gateways and delivers the IP of the selected security gateway to the relay server. The scraping engine delivers, to the relay server, scraping request information including a service script and certificate information about a client.
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