||Thermochromic materials exhibit color change when they experience temperature change. Such materials have great potential for many applications such as smart pigments or colorimetric sensors. Especially, encapsulation of thermochromic materials into microcapsules gives new opportunity in their applications; for example, the microcapsules can report the distribution of temperature. To address this, we have developed a microfludic method for fabricating thermochromics photonic microcapsules. We encapsulate aqueous suspension of colloidal particles into the core of double-emulsion droplets. The particles are consisted with the core of high refractive index material and shell of temperature responsive material. Positive osmotic pressure selectively pumps water out through middle layer of double-emulsion, thereby resulting in concentration of particles and formation of colloidal photonic crystals. These photonic microcapsules change their structure color as temperature is varied.