Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp

The invention discloses a color temperature adjustable LED (light emitting diode) device, comprising a substrate, an LED chip loop arranged on the substrate and packaging adhesive covering on the substrate, wherein the LED chip loop comprises a first loop and a second loop, the first loop is at least in series connection with a green LED chip and a red LED chip, the main wavelength of the red LED chip is 605nm to 625nm, and the driving current of the first loop can be adjusted; and the second loop is used for synthesizing white light. The color temperature adjustable LED device has the advantages of simple structure, convenience for use and low manufacturing cost, and the effects of wide adjustable range, low color tolerance, and color coordinate variation trend identical with the Planck black body curve can be achieved only by using a simple driving and control power supply.