[ckc_douglas]

Canon S5is, there are so many noises or blurred image taken, how can I improve it?

[Freaky]

Try to limit your shots with ISO 200 or below. The blurred photos are likely due to hand shaking as a result of long exposure time. This is not a peculiar problem of S5 IS but will happen to all DCs. If you want to take shots under insufficient lighting conditions, you have no choice but to use a tripod.