The youth TV broadcaster will promote its nine flagship TV channels including MTV One, MTV Hits and VH1 through specifically built campaign sites, which are each linked to its revamped main site.
The move enables MTV.co.uk to be relaunched as a generic music and entertainment destination.
MTV said that the new website will also feature exclusive news and video content.
MTV News will become more central to the company's online offering, after young people identified it as one of their favourite features.
The move is also designed to take advantage of what MTV calls its 360-degree commissioning - where new projects are commissioned with TV, online, mobile and other brand extensions in mind.
The multimedia commissioning approach bore its first fruits last year when MTV launched online games around Pimp My Ride and Totally Jodie Marsh.
The website relaunch is based on findings from an MTV research project conducted last year, which sought to find out what 16 to 24-year-olds wanted from digital technology.
The move is also in response to increased competition from emerging youth-oriented sites.
MySpace, which has developed from a social network into an entertainment portal by investing in video and music, is seen by many as the main online hub for young musicians and music fans.
MTV's online relaunch follows its decision to axe its user- generated content-led TV channel MTV Flux.
MTV will keep its Flux online service, but has decided to replace the TV channel with a time-shifted version of MTV One from next month.
The Viacom-owned firm has ramped up its online presence in recent years as youth consumers increasingly turn away from multichannel TV and to the web for their entertainment.
Sites such as MySpace and Bebo have built huge audiences partly by offering bands their own space to advertise and interact with fans.
MTV attracted 1.2 million unique users in December 2007, compared to MySpace's 9.3 million, according to figures from online research firm comScore.