not any Australian, or a parent BUT

i think your children will have a better life, be able to develop and grow as individuals, be creative, challenged, able to make their own mistakes, be more rounded individuals if you go to live in Australia.

They won't be shells of people, only interested in shallow superficial things, brainwashed and have their personalities sucked

They won't spit or pee in public, (i hope) and maybe be willing to help a stranger in need.

look at the people around you and ask yourself, how do you want your children to be?

Yes

  Ideally, you would visit Australia with your family first, to see if it works for you. I've done the same move (but for us, it's New-Zealand who caught our hopes and hearts), we traveled there and loved what we saw. I would not decide to emigrate without having a look with my wife (checkout E2NZ to see everything wrong about New-Zealand). Australia have to have some issues, try to find which and see if it's fine for you.

Bottom-line, in Australia, people will understand the concept of waiting in a line, walking on the walkway, driving in the correct lane, kids will have time to be kids, people will have some sense of neighborhood, say "hi" and won't stand looking at you but doing nothing if you have a heart attack. Top that with clean public facilities. Several Australian cities (Sydney, Adelaide, Melbourne) tops in world rank in term of quality of life. It seems the cultural life is thriving as well.

I was fortunate to have lived in Melbourne, Australia for 3 years during a business secondment there. The Chinese community is quite large but tend to cluster within a few suburbs - Boxhill, Whitehorse, just to name two of them. However, Perth in Western Australia has the most number of Chinese people from all over, not just China. I suggest you explore Perth first before going on to Melbourne. As DrMonkey said, there will be issues during you first months there such as waiting in line, saying how are you, thank you etc. Generally, people are polite and are wiling to help strangers in a fix. However, there are pockets of people who don't like Asians so be prepared to be harassed at times. Other than that, it's a good life. No subway squeeze, no filth, no smog...nice!

The average wage was announced this week  at $70,000 pa  You will need a visa that will allow you to work before you get here. you will also need to pay your own medical until you have PR and that take 2 years to get. rent in Brisbane is around $300 a week for a 3 bedroom house in the suburbs . Public transport is a pain in the Ass in outer Brisbane but is better in other major cities.to get a idea about jobs avaliable Australia may i suggest SEEK.com or my career .com  remember we have strict quarinteen rules so make sure you declare everything at the boarder . Oh and most Australians spell better than me

If you have to ask then you should stay in China. 

It's cleaner, more organised, with a much higher standard of living, and a much greater respectt for the rule of law. The food is safe and much more diverse and there are people from a huge range of countries and cultures, which is nice. I am sure its a much better place for your kids to grow up. I think Australia is a better place to live.

But phil's warning is absolutely right. Oz is mental expensive, and you or your husband/wife will need an extremely good job if you want to support kids. (300 for a 3 bed house??? I only wish Sydney was that cheap!!!)

”Can i and my wife find job that can pay more than what we earn in Beijing? I make 20k rmb in China.”

Please don’t be offended but if this is your biggest concern then maybe you have been here too long already. How much you make per month is a really short term goal and exactly how most Chinese think.
I for one don’t even look at jobs in any major northern city, let alone Beijing. Do you really think that living there and breathing that air etc. is worth a few thousand dollars a month. Any money you make now will most likely be more than offset by future medical expenses and or quality of life issues as you and your family age.
If you own an apartment that you can make a lot of money off of sell it before the inevitable market correction take place.
If for some reason you didn’t like Australia, you could always come back. Maybe in 10 years you can buy back your apartment for 50 % of what you sold it for and the air will be a bit cleaner and your children will have learned to think for themselves.

I'm not an Aussie, but I can almost assure you that living in Australia is better than living here.  You and your wife have to decide on your goals as a family, but I'd say you're doing your kids a disservice by staying in China.

For your family, seize the opportunity.  The lives of children are horrendous in China.  If you go to Aust your children will have a much better chance of developing as normals.

But getting employment won't be easy, unless you're something special.  You will need at least $400/wk for rent and the price of a beer is about $5.  A bus ride costs about $5 too.

Does your wife speak English?  An important thing if she's to be able to get a job that's real.

See your kids safely through to adulthood and then get back on the travelling horse.  This should be you and your wife's primary concern.

Brisbane's weather is the best in the world.  Melbourne is a fabulous city but their weather is the worst in the world.  Sydney is great for a long weekend but too mad to live in.  Adelaide's weather is too extreme and Perth is too far away and has too many Poms.  Go for Brisbane.  Better yet, go for the Sunshine Coast just north of Brisbane.