A long-distance outdoor communication experiment based on a commercial light-emitting diode (LED) source is carried out. In the experiment, the LED source is modulated by on-off keying (OOK) modulation. The low-density parity-check (LDPC) error-correcting code is used at the receiver. The outdoor light communication experiment with communication distance of 1 km is accomplished at clear daytime when the beam of LED is launched with divergence angle of 3° and modulation rate of 23 MHz (net data transmission rate is 11.5 Mbit/s), and the bit error rate of 10-6 is achieved. The experimental result shows that the data transmission rate with LDPC (4000, 2000) code is 2.4 times than that without coding when the bit error rate is 10-4. The experimental system is not need to accurate collimation and can overcome the negative environmental consequences such as the wind shaking and the atmospheric turbulence.