The rapidly-developing information technology has brought internet to millions of families. Modern society entered an “Internet Age”， connecting more and more people and making them “netizens”. Although we indulge ourselves in the convenience brought by internet in workplaces and during daily life， the unsafe factors are concomitant. The widespread violence and pornographic contents are poisoning the netizens， especially the ones still in adolescence. The task of cleansing the internet environment and protecting the adolescent netizens has become the joint challenge for countries， especially the countries with high population of internet users.

隨著科學(xué)技術(shù)的迅猛發(fā)展，互聯(lián)網(wǎng)以驚人的速度進(jìn)入千家萬戶。網(wǎng)絡(luò)技術(shù)不僅將現(xiàn)代社會(huì)帶入一個(gè)“網(wǎng)絡(luò)時(shí)代”，也讓越來越多的人們加入到網(wǎng)民大軍中。然而，網(wǎng)絡(luò)技術(shù)在給人們的工作、生活等方面帶來便利的同時(shí)，網(wǎng)絡(luò)不安全因素如影隨形。網(wǎng)絡(luò)世界中的暴力、色情、血腥等內(nèi)容對廣大網(wǎng)民，尤其對尚處成長期的青少年來說，更是危機(jī)四伏。如何凈化網(wǎng)絡(luò)環(huán)境，保護(hù)青少年網(wǎng)絡(luò)安全，已經(jīng)成為世界各國，尤其是網(wǎng)絡(luò)發(fā)達(dá)國家共同面對的挑戰(zhàn)。