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To study the aeroelastic phenomena in turbomachinery a microcomputer monitor system and device for non-touch measurement of turbine blade vibration is developed by authors. The system can, continuously and with non-touch way, measure blade amplitude of vibration, phase angle and torsional angle at one stage of turbines when the machinery blades encounter vibration. In the case of turbine operation, it can display and print the vibrating parameters measured by the system, automatically give out the warning when blade amplitude of vibration is bigger than safety value or blades break, and print the vibrating parameters in a span of time before the break occur. Especially, it can give out forcecast as soon as blades enter the flutter boundary. The paper describes the principle of the system and computer processing method with the measuring reports from test-table and full scale testing unit.