The history, development status and future trends of integrated optics technology in Taiwan were summarized in this paper. Several groups including academic and industrial research manpower had engaged in the technology developments of integrated optics for seven years or more in Taiwan. So far, all the budgets were supported by government. The research contents include device simulation, device design, device fabrication and system integration on substrates of Si, GaAs (InP) and LiNb03 for electro-optics applications. The topics can be summarized as surface acoustic wave (SAW) devices, electro-optics switch and modulator, integrated optics pick-up devices, design packages of optical components, optical filter and delay line. The future trends contain the optical signal processing, wavelength filter, wavelength multiplexer / demultiplexer acousto-optics and electro-optics devices and subsystems, optical coupler and system integration technologies etc. All the approaches of each topic depends on the strategy of applications.