In　this　paper　a　new　manufacture　technology　of　the　micro-lens　generated　on　needing　positions　is　suggested.　This　technology　doesn＇t　need　mould　or　masks,　it　generates　the　micro-lens　on　the　needing　positions　directly　according　to　needing　curve　shape.　It　is　a　simple　and　quick　laser　micro-manufacture　technology,　which　solves　the　difficulties　of　high　accurate　separation　the　micro-lens　from　substrate　and　adhesion　the　micro-lens　to　working　face　coaxially.　A　micro-detector　to　fluorescence　spectrum　using　the　micro-lens　generated　on　needing　positions　is　made.　The　detector　has　many　advantages,　for　example　high　sensitivity　and　micro　volume.　It　can　be　inserted　in　biochip,　and　it　is　used　in　alarm　system　of　harmful　microbes　in　spacecraft　also.