Large　amounts　of　waste　electric　and　electronic　equipment　(WEEE)　has　been　produced　due　to　continuous　technological　innovation　and　the　improvement　of　living　standards.　Based　on　the　rich　metal　compositions,　waste　printed　circuit　boards　(WPCBs)　are　considered　as　the　most　valuable　component　among　WEEE.　The　recycling　of　metals　from　WPCBs　with　inappropriate　methods　or　in　informal　sectors　has　been　a　profitable　business,　which,　however,　wastes　resources　and　is　harmful　to　environment　and　human　health.　Proper　methods　that　are　ecofriendly　to　recover　metals　from　WPCBs　are　therefore　urgent　and　essential　for　both　industries　and　policy　makers.　In　this　article,　the　technology　details　of　metal　recycling　processes　are　reviewed　based　on　past　research　efforts　to　provide　a　complete　image　of　the　current　status.　The　advantages　and　problems　of　several　conventional　methods　are　summarized　and　compared　according　to　cost,　environmental　impact,　and　recovery　efficiency.　Possible　approaches　for　improving　mechanical　treatment　and　bioleaching　methods,　are　accordingly　analyzed.　Novel　hybrid　processes,　such　as　chelation　technology　&　bioleaching　process,　green　adsorption　&　chemical　leaching　process,　etc.,　are　put　forward　to　open　up　possibilities　of　multi-technology　coupling　processes　for　metal　recycling　from　WPCBs.