大運會改變我的八字嗎？

不會。四柱八個字是固定的，大運是疊在上面的另一組干支，用來看不同時期的組合變化。

為什麼不同工具算出來的起運歲數不一樣？

因為起運是從出生到最近節氣的時間距離換算來的，換算比例與取捨方式各流派不同。結果取決於那個工具採用哪一套約定。

大運和流年哪個比較重要？

傳統上兩者一起看：大運是十年的背景，流年是當年的那組干支，解讀時看它們和日主、原命盤之間的關係。各家對兩者比重的看法不一致。

Do luck pillars change my natal chart?

No. The eight characters of the four pillars are fixed. A luck pillar is a separate stem and branch layered on top, used to look at how the combination shifts over time.

Why do different tools give different starting ages?

Because the starting age is converted from the time between birth and the nearest solar term, and schools use different conversion ratios and rounding. The result depends on which convention the tool follows.

Which matters more, the luck pillar or the annual pillar?

Traditionally they are read together: the luck pillar is the ten-year background and the annual pillar is that year's stem and branch, both read against the Day Master and the natal chart. Schools disagree on how much weight each carries.

大運是什麼？八字的十年運怎麼排

作者：Wei Chun Chuang・2026-10-24

八字的四柱是固定的，但傳統讀法不只看固定的那八個字，還會看「大運」——一組一組往前走的十年干支。這篇說明大運是什麼、怎麼排、起運歲數怎麼來，以及為什麼不同工具算出來可能不一樣。

大運是什麼？

大運是疊在原命盤（四柱八字）之上的一柱干支，每一柱管十年。原命盤不會變，變的是每十年換上來的那組天干地支，以及它和原命盤之間的關係。所以同一張命盤在不同大運期間，傳統上會被讀成不同的組合。

大運是怎麼排出來的？

大運從月柱開始，沿六十甲子往下或往上走：

看年柱天干的陰陽，再看性別。陽年男、陰年女為一組，順著六十甲子往後排（順排）；陰年男、陽年女為另一組，往前排（逆排）。
以月柱為起點，依上一步的方向取下一組干支，就是第一柱大運。
繼續同方向往下取，得到第二柱、第三柱……每柱十年。

例如月柱是「丙寅」而需要順排，第一柱大運就是丁卯，接著戊辰、己巳；若需要逆排，則是乙丑、甲子、癸亥。

起運歲數是什麼意思？

第一柱大運不是從出生就開始，而是從某個歲數「起運」，之後每十年換一柱。起運歲數的算法是看出生時刻到最近一個節氣的距離：順排的看往後到下一個節氣，逆排的看往前到上一個節氣，再把這段時間換算成年歲。

常見的換算是以三天折算一年，不足三天的部分再按比例換成月、日。要特別說清楚的是：這一段的算術約定各流派不同——用幾天折一年、不足的部分怎麼進位或捨去、要不要精算到時辰，都有不同做法。因此同一個生日，不同書或不同排盤工具給出的起運歲數可能相差一兩歲，排盤結果取決於那個工具採用哪一套約定。

一柱大運常再分成兩半

十年是一個區段，但許多讀法會把一柱大運再切成天干、地支兩半：前五年偏重看大運的天干，後五年偏重看地支。這也是流派差異之一，有的只整柱看，有的另有別的切法。

流年怎麼疊上去？

流年就是當年的那組干支，例如 2026 年是丙午年。流年疊在大運之上，形成「原命盤＋大運＋流年」三層：原命盤是底，大運是這十年的背景，流年是這一年多出來的那兩個字。傳統上會看流年和大運之間、以及它們和原命盤之間的關係，有些讀法還會再往下看流月、流日。

怎麼讀一柱大運？

讀法的重點不是「這柱好不好」，而是關係：

這柱的天干對日主是什麼十神關係（同我、我生、我剋、剋我、生我，再分陰陽）。
這柱的地支和原命盤四個地支之間有沒有常見的互動，例如相同、相合、相沖。
這柱補上了原命盤比較少的五行，還是加強了本來就多的。

換句話說，要先認得自己的日主與原命盤的五行分布，大運才有東西可以對照。這也是為什麼入門順序通常是先四柱、再日主、最後才看大運。

最後提醒：大運是一套用來整理時間軸與思考自己處境的框架，不是對未來的保證。醫療、法律、財務這類重大決定，請諮詢合格的專業人士。

常見問題

大運會改變我的八字嗎？: 不會。四柱八個字是固定的，大運是疊在上面的另一組干支，用來看不同時期的組合變化。
為什麼不同工具算出來的起運歲數不一樣？: 因為起運是從出生到最近節氣的時間距離換算來的，換算比例與取捨方式各流派不同。結果取決於那個工具採用哪一套約定。
大運和流年哪個比較重要？: 傳統上兩者一起看：大運是十年的背景，流年是當年的那組干支，解讀時看它們和日主、原命盤之間的關係。各家對兩者比重的看法不一致。

想用 App 練習？

想看自己的大運怎麼排，時來－八字是一款教你讀八字的 iPhone 課程 App，四柱與大運都由 App 計算，一堂一堂帶你讀。目前已送 App Store 審核，尚未上架。想先看命盤，可以用免費、免登入的八字網頁版，附排盤與二十堂課程。

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What are luck pillars (Da Yun) in Bazi?

作者：Wei Chun Chuang・2026-10-24

A Bazi chart's four pillars are fixed, but traditional reading does not stop at those eight characters. It also uses luck pillars, Da Yun: a sequence of ten-year stem-and-branch periods. This article explains what they are, how they are laid out, where the starting age comes from, and why tools can disagree.

What is a luck pillar?

A luck pillar is one stem-and-branch pair layered on top of the natal four pillars, each covering ten years. The natal chart never changes; what changes is the pair that comes in every ten years and how it relates to the natal chart. The same chart is therefore read as a different combination during different luck pillars.

How are luck pillars laid out?

They are derived from the 月柱, counting through the sixty-cycle either forward or backward:

Look at the polarity of the year stem, then at the person's sex. Yang-year men and yin-year women form one group and count forward through the sixty-cycle; yin-year men and yang-year women form the other and count backward.
Starting from the month pillar, take the next pair in that direction. That is the first luck pillar.
Keep going in the same direction for the second, third and later pillars, ten years each.

If the month pillar is Bing-Yin and the direction is forward, the first luck pillar is Ding-Mao, then Wu-Chen and Ji-Si. Counting backward instead gives Yi-Chou, Jia-Zi and Gui-Hai.

起運歲數是什麼意思？

The first luck pillar does not begin at birth. It begins at a starting age, after which a new pillar comes in every ten years. The starting age is computed from the distance between the moment of birth and the nearest solar term: forward counting looks ahead to the next solar term, backward counting looks back to the previous one, and that interval is converted into years of age.

A common conversion treats three days as one year, with any remainder scaled into months and days. It should be said plainly that these arithmetic conventions vary between schools: how many days stand for a year, how remainders are rounded, and whether the hour is included all differ. Two tools can therefore give starting ages a year or two apart for the same birth, and a chart tool's result depends on which convention it uses.

A pillar is usually split in half

Ten years is one block, but many approaches split a luck pillar into its stem half and its branch half: the first five years weight the stem, the last five weight the branch. This too is a point of difference between schools. Some read the pillar as a whole, and some divide it another way.

How do annual pillars sit on top?

流年就是當年的天干地支，例如 2026 年是丙午年。流年疊在大運之上，形成三層：底層是本命盤，大運是十年的背景，流年則是該年多出的兩個字。讀盤時會看流年與大運、本命盤之間的關係，有些方法還會進一步看流月與流日。

How do you read a luck pillar?

The point is not whether a pillar is "good", but how it relates:

What Ten Gods relationship its stem has to the Day Master (same as me, produced by me, controlled by me, controlling me, producing me, then split by polarity).
Whether its branch has one of the familiar interactions with the four natal branches, such as being identical, combining or clashing.
Whether it supplies a phase the natal chart has little of, or reinforces one it already has plenty of.

In other words, you need to know your Day Master and the phase distribution of your natal chart before a luck pillar has anything to be compared against. That is why the usual learning order is four pillars first, then the Day Master, and luck pillars last.

One closing note: luck pillars are a framework for laying out a timeline and thinking about your own situation, not a guarantee about the future. For medical, legal or financial decisions, consult a qualified professional.

常見問題

Do luck pillars change my natal chart?: No. The eight characters of the four pillars are fixed. A luck pillar is a separate stem and branch layered on top, used to look at how the combination shifts over time.
Why do different tools give different starting ages?: Because the starting age is converted from the time between birth and the nearest solar term, and schools use different conversion ratios and rounding. The result depends on which convention the tool follows.
Which matters more, the luck pillar or the annual pillar?: Traditionally they are read together: the luck pillar is the ten-year background and the annual pillar is that year's stem and branch, both read against the Day Master and the natal chart. Schools disagree on how much weight each carries.

Practise with an app

To see how your own luck pillars are laid out, Shilai – Bazi is an iPhone course app that teaches you to read Bazi lesson by lesson, with the four pillars and the luck pillars calculated for you. It is currently in App Store review and not yet released. To look at a chart first, there is a free web version with no login, including a chart tool and twenty lessons.

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