Abstract: The initial flowrate of turbine flowmeter and its installation method in natural gas pipeline are discussed based on the metering principle. The flowrate has a linear relationship with rotational speed in the condition of an optimum initial flowrate. The inlet and outlet of flowmeter are recommended to elongate a straight pipe secton. If the installation space can not meet the demands, rectifier is advised to install between the resistance device and flowmeter in order to avoid the influence of gas flow pattern variation upon the running of flowmeter rotor. The common failures of turbine flowmeter happened in the course of running are analyzed. These failures are that flowmeter can not work in the case of normal flowing of gas; the display of gas flowrate is gradually decreased under the condition of normal running, the display of gas flowrate is not as "null" in the condition of not flowing. The corresponding operation and maintenance methods are provided respectively. Also, the matters needed to pay more attention in use of flowmeter are presented combined with cases.