Abstract: Stop spacing is key design variable in urban public transport networks. It determines both the travel time for the passengers and the costs for the operator. Stop spacing influences the average speed of a public transport vehicle, the access distance and thus the access time. In order to offer a certain theoretic basis to the design and decision of public transport network and its stop spacing, the paper provides optimization method of public transport in three aspects:passengers, operators and authorities. Multi-object optimized models are presented to minimize weighted travel time of passengers, maximize the cost effectiveness of operators and maximize social welfare.