The invention discloses an intellectual property transaction method based on an alliance block chain, and the method comprises the steps that 1, a service provider node provides intellectual properties which can be provided by the service provider node and the value bidding price of the service provider for the intellectual properties to a transaction service provider node, and stores the intellectual properties into the block chain; step 2, the transaction service party node performs quality evaluation on the intellectual property provided by the service provider node, and finally performs quality pricing on the intellectual property; 3, the service demander node provides an intellectual property demand for the transaction service node, sets a threshold value and the weight of the value and the quality, and stores the intellectual property demand into a block chain; and step 4, the intellectual property demand of the service demander node is matched with the intellectual property provided by the service supplier node. It can be ensured that intellectual property transaction information cannot be tampered, and the method is public, transparent and active and traceable, so that thecredibility of intellectual property transaction is improved, and infringement behaviors are also avoided.